Malicious PDF — malware analysis report

Static analysis result for SHA-256 98aa68ad85369a5f…

MALICIOUS

PDF

83.8 KB Created: 2021-09-07 19:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2de83412e302f98b66a050c83f0714f8 SHA-1: 65b8fd0acbfa2b6a726e263dcbbcff91f939b4d1 SHA-256: 98aa68ad85369a5f71a06cac5db3fddad1d9f780cf9ae4eca917758a7b32cc8b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF_URI_IP_LITERAL and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating attempts to obscure the true destination or leverage SEO tactics for malicious links. No scripts were extracted, but the overall structure and heuristics point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/eb6ffffac8b776523503a2d1eb488887/rilutabad.pdf In PDF document text
    • https://careersourceokaloosawalton.com/files/public/38643103588.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/59683048301.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080982f2be51---41496003571.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/manumidexukovubozejil.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40e7575f21---97130174245.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1610d8087e5919---39145865928.pdfIn PDF document text
    • https://dejavuruse.com/userfiles/file/juteluju.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161157140c3c8b---45025602453.pdfIn PDF document text
    • https://alhurwallpaper.com/Files/files/xejudumimiramax.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/2d68df578e0a47d5fe141858f1e33386/vuvezokejurosep.pdfIn PDF document text
    • http://www.klimavill.com//data/editorfile/77668650184.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1624276504punuzofovumupik.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/51605037530.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a703684d182---84957626088.pdfIn PDF document text
    • http://raczcsalad.hu/files/64030545782.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609075cf21d16---xisoluxujexasodana.pdfPDF link annotation
    • http://hiroi-es.info/yamituki-n/uploads/files/26504506121.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/11304614943.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd064e9bb8a---ninetunatajitotadeg.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/xagitujodofikorukipusan.pdfIn PDF document text
    • http://montazenabytkupraha.cz/files/file/40832210222.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/28413606635.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca95a9475bb---57733097974.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/4fde9688a0b4729d3cb06fb0a5801adf/gukimewaresajo.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b6eecf963bd---tamilalobitejijep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=legrand+myrius+switches+catalogue+pdfPDF 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_off0000e132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE132 17536 bytes
SHA-256: 547513a0e2596c2cb3404d47631fd35d9fdb0f82608763062d076d338b9d7866
font_01_sfnt_off00010eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C2 11324 bytes
SHA-256: dc588a8f01defa659493c324e962158bd368089c9d476a77db1372ca9987e6a9

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