Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5a8476bf3393c8…

MALICIOUS

PDF

70.3 KB Created: 2021-09-24 23:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c5b4d4e0d1b6ea95676755b2e8a8881e SHA-1: d96dee6063231f7b006fb1523cad2dea8108130b SHA-256: ba5a8476bf3393c8198f4c871fb4deb70e704fa00ae06e13289ea9cc62dbf69d
196 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of a callback lure heuristic further supports a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://envisystem.com/upload/userfile/files/25312402592.pdf In PDF document text
    • http://www.anjhimayath.com/upload/file/fibisugodomarabakifilomu.pdfIn PDF document text
    • http://dsacare.com/admin/uploads/file/pifozinedotalimugosop.pdfIn PDF document text
    • https://cooperspick.com/files/rijavuzisaseg.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/cum0bd59hq5bpl2fve3hj0mtd6/fafexatakitumok.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gotipovivetewazejab.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/labenaga.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/161461aca1add8---42217014576.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/ziredabuxirubogafo.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/e80a3f6fadc5b60c31ebca561727659f/24995176571.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/16147ab6f1b7b2---kipojojevonodufufovapad.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/dotutin.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/74503504419.pdfIn PDF document text
    • http://cocoon-source-harmonie.fr/public/file/53235701599.pdfIn PDF document text
    • https://buildingexpertsdirectory.com/ckfinder/userfiles/files/pebivofofowo.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/h5uv4or9t5833k2flbk45s7cpr/torupudot.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/b3d93koqsp8aur3rtpeh4ekdsd/wafajepepedexuge.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/47440927030.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/joxafilevunu.pdfIn PDF document text
    • http://galettedesrois.hu/userfiles/file/95455196090.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109040118545170.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109131509118895.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/10253408969.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=animal+crossing+new+horizons+app+androidPDF 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_off0000b0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D7 16380 bytes
SHA-256: 3fc03a9a380ee2b1094c6a94782c3fd30e99c8bceed696bc2628151f423871d8
font_01_sfnt_off0000da89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA89 10988 bytes
SHA-256: 32f435a8e55595545b017bef5dfd923707be7755bb7d91d4ebb29f0243a4acac
font_02_sfnt_off0000f3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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