Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f052e92f38ee0fd…

MALICIOUS

PDF

79.7 KB Created: 2021-07-07 04:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6a6d2c5d7b09d21fc7e436a49ea43900 SHA-1: 159892ecc9e1bff11f6f15cde7759798b35ad5c1 SHA-256: 2f052e92f38ee0fd5b1abd5a4e5d5ffcf22def539869629dcd1af79c52d3d114
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The 'SE_CALLBACK_LURE' heuristic indicates the document may also be designed to trick users into calling a fraudulent support number. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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) 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://shavers-boles.com/clients/7/73/73b1ad2e2c85410b7b015c0c79a6caf4/File/letaxeze.pdf In PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/f3601978a8c79006d3ef756b8eb18ace/52053636999.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dfec15285---zafixibudi.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/3dff9b6935a96e84019f74b066c10899/14923868713.pdfIn PDF document text
    • http://alexandercdg.com/clients/36029/File/15177995902.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/hf0qudkdr7cnh7mthdp7ej01i0/gerojezibizisiroposevito.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/31944139203.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d79727fec7---14567052075.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/65b3146d56acb1fc408e2943068f846f/77138719806.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/5dghmugdlp839diko6t0u78v6e/dapogebuvopi.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/sogaxoka.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/12102287546.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/fesudiduvokilatiwigeke.pdfIn PDF document text
    • http://dges.in/userfiles/file/bizukamedojoj.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/gojesigive.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160716eee11b74---94624554452.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/ruwujozewuwixojuberewawil.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/81573944879.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f54164485---14213980245.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ff84146cd---niguwo.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/kugokaxuvekosutuzuke.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/92763197575cb524c42dcfee8253d49e/bajebukupuliwokisij.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160712d49dca19---zegesavikekabuzixen.pdfIn PDF document text
    • https://vinadesigndanang.vn/uploads/image/files/17849939865.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5cc30ff8776523c65d81e855b87bb4c6/pawetedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=freedom+cash+lenders+login+to+my+accountPDF 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_off0000d1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 17704 bytes
SHA-256: b95a8dd07441e13ba266167df3cec827272ffe9bf3c3a3dc64597a6a518f3c40
font_02_sfnt_off00011828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11828 11008 bytes
SHA-256: bed223f5856dc0c4e8f812e78744f392320c9590d0385ccbda9dd9af70ed24fa

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