Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e7eab5a1b0082f…

MALICIOUS

PDF

85.4 KB Created: 2021-07-01 10:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 5715f537c217797d83af7abba51c36ce SHA-1: cd5bb72728bd3e88b754fd7f851a15eeec76632b SHA-256: 17e7eab5a1b0082fc90e058f4dc45e22c62d9c7631ad2225de22804bf985c379
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on compromised CMS uploads. The document body is heavily obfuscated, but the presence of multiple URLs pointing to potentially compromised WordPress sites suggests an attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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) or Microsoft license-boilerplate 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 http://veraschwemmle.de/fckdata/file/41834681131.pdf In PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c53205aaba5---pixefuwawipurapavol.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc6f8da07d---86669160790.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/rijujimelojorozelafanu.pdfIn PDF document text
    • https://123natura.com/stockages/files/89728125591.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/ecf545f9cce51db2de2f234db2473c4b/13525327282.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/lisivefojufabubipebij.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4efdc7ea43---jevilumunibovaguwimi.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/so86orck3n55nstsrfoa54ukd8/pimebivolidetevokofopisaj.pdfIn PDF document text
    • https://olterus.net/contents//files/pivimiris.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfa180a26---kiteputidukipowaniperuzu.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/8bcd2fbdc71f3c8592c055e9bd3a8eda/voximutidanarenagawilot.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/61557820672.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9af9c8ff---25738628432.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/38780993699.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608027bd4ab9f---22906517007.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e0094191d---23349313829.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c34f5086d5a---84680995262.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/biwesigugeragalexipubata.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16095360002282---50300416375.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/33515801446.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/bilanaliva.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/54298910691.pdfIn PDF document text
    • http://campcolefamilyreunion.com/clients/82065/File/lojukug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=types+of+glucagonPDF link annotation
    • 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_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 17372 bytes
SHA-256: 91437aba5f6c96943af6fdcb5a098af84eb34c4a9fd75630982eebf362905c7d
font_01_sfnt_off00011843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11843 10540 bytes
SHA-256: afc97756b4f25c85e9a3e3443d01fd632e32bf4d06baea857b57db07f6ae1802
font_02_sfnt_off00013084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13084 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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