Malicious PDF — malware analysis report

Static analysis result for SHA-256 40987e19e166084a…

MALICIOUS

PDF

79.3 KB Created: 2021-07-22 14:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9f77ff06396e911a2d31e4ab122406a4 SHA-1: 1c97a1f55c49a4d0dde6ecae109aeb1e8b104236 SHA-256: 40987e19e166084ac2f0c1bdc0b7bb3c84b1633de50d52378a661b0f1b2f0e6d
204 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, indicating a phishing or trojan payload. The presence of a 'download button' lure and a 'password-protected archive' hint suggests a social engineering tactic to trick the user into downloading a secondary malicious file. Multiple URLs point to compromised CMS uploads and link farms, likely hosting the actual payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ficsllc.com/wp-content/plugins/super-forms/uploads/php/files/jte01okchusqtguj7f85ueabbe/45390238306.pdf In PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a56c5a94ffb---75562459816.pdfIn PDF document text
    • http://i-dron.cz/data/file/25513988139.pdfIn PDF document text
    • http://infinijewelry.com/userfiles/file/407064493.pdfIn PDF document text
    • https://familienarbeit3plus.ch/userfiles/files/kaganipufokizut.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d1df75373b5---jimoturi.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/386f1354303328ac17546ea0381e4d5e/todafemidid.pdfIn PDF document text
    • https://alkathirilaw.com/userfiles/files/sizaka.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/55e0add8132c8ef9f448e799291c2a06/ramavuxetusutoga.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a57c221cafae8aa0dee5d4b4d7768f5/99172062372.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/dotirimofu.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7c4e73fe11a3ea640e6f14beba057437/panuwidevezusisoxija.pdfIn PDF document text
    • https://equinox-e.com/upload/files/82757795097.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a90b7b4ef---vafudim.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e0cae6d2b516074fb5f8189876f0a922/wogepegepafitoraj.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/xomomemekosus.pdfIn PDF document text
    • https://alianzatours.com/imagenes/file/rodiruwi.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ee70efed9---munavogotifer.pdfIn PDF document text
    • http://tebsc.com/clients/84181/File/niganutumatidovu.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/97a14b5bffc1e7452c4502f0f3b0b7f6/14861978389.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094dd878ccfa---degodogosibasebodumad.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b465d783ec3---99292683709.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=world+of+warcraft+books+downloadPDF 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_off0000d1bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1BC 10556 bytes
SHA-256: b442497fc67b09858845cc34036cd87d9e444f81d2454f107f8a60dc02fc4730
font_01_sfnt_off0000ea02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA02 17292 bytes
SHA-256: 8eacf0ea7ff43d17244c2a2b45fc150e37a6c9d54458809a7c184933106362e3
font_02_sfnt_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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