Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac17c5fa4719211…

MALICIOUS

PDF

126.5 KB Created: 2021-06-25 23:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7b38cefd79c53b9bef95b3c003742c2a SHA-1: 6c1cfc29f4d43375291dd4853c8befaa6efc269a SHA-256: 8ac17c5fa471921171d4f3e5814fbc4a09e267f88d7feb4963d4aaa43fe4414c
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is classified as malicious, exhibiting characteristics of an advance-fee scam. It contains lures related to lotteries, prizes, or parcel deliveries, combined with references to funds or drafts, and mentions courier delivery requirements. The document also includes callback phishing elements, prompting users to call a phone number in a context of billing, refunds, or security issues. Numerous URLs were extracted, many pointing to compromised CMS upload storage or disposable hosting, suggesting a distribution network for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crewmak.ru/uplcv?utm_term=federal+ppp+loan+list PDF link annotation
    • https://stopserv.ru/files/file/54184092212.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/85090277285.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/91a69d756e8f60dc7959c6d87cf28162/48893955484.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/q1gdfk9v7nc7s3rlgqluqvk60m/gunar.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/84660664300.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607268c1ab604---53392758025.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/jiwazaxutif.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/57694160464.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/6d950b87444bf6b670977d6a0f6710e7/zujoxerabofupasevaxapem.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/reloxapukamasiwekotevezam.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/0r4jkntkl1ridp6docb4c9qhef/nolupelobosisax.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/242f566ddc77699072dfeed1adb4178b/71416585395.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609830d0bfd3b---bofezosowolusipo.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/namixeparilipegiserajikiz.pdfIn PDF document text
    • http://swingdesignhk.com/userfiles/49460498552.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/99732642488.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084b14a25fb3---kovojepegipafanenudu.pdfIn PDF document text
    • http://argol-editions.fr/userfiles/file/filupitedemipelaxo.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/1ccee4127fa4ea58dccf816cd45d9ed0/rixanupovolirosokep.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2fdb8dfa6---xesasuwunexegolonuru.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65c8041a96---18266375661.pdfIn PDF document text
    • http://labonscafe.com/userfiles/nulotem.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/lodajataxutiwulu.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819fd749dae---vidanufafonaxisuviwijim.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018cae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CAE 17736 bytes
SHA-256: 39dfdc6be9c6796e33e2649362a53df175f5b40dd1678ce114fe3b3e8c3df454
font_01_sfnt_off0001bb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BB6E 10364 bytes
SHA-256: b3937e707eaf301b4f462aafbf4e05abe264b06780b246e4cf9fa9bb47c2848e
font_02_sfnt_off0001d2e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2E8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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