Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d983d04c375b7b…

MALICIOUS

PDF

73.5 KB Created: 2021-02-03 01:22:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 148df93c9a52d430506db4a7664f7b01 SHA-1: 3fa5c7c7d48e9622c255583b6ad75d9bfc29e2c6 SHA-256: 69d983d04c375b7b9a720f8ced87e93b31bedfc688569ce2110950ab378ab702
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ClamAV and a machine learning classifier. It functions as a link farm, presenting a lure of an "Air force orders request form" to encourage users to click on numerous embedded URLs. These URLs predominantly lead to other PDF files hosted on disposable domains and link farms, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/aws?utm_term=air+force+orders+request+form PDF link annotation
    • http://everydayy.fun/regitadap9wgrw.pdfIn PDF document text
    • https://cdn.sqhk.co/dovoxukeni/ZLicfha/cute_puppy_dog_full_hd_wallpaper_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xafeperale/Siijdgg/idle_heroes_private_server.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501193/normal_5fed696fa8c3d.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/aiikifR/mufusazekonagojo.pdfIn PDF document text
    • https://cdn.sqhk.co/goxobuve/hcjhhfZ/zavovexaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/jhjhfii/51264835932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5ff2d8004db0a.pdfIn PDF document text
    • http://fortuneocredit.com/medidas_estandar_y_milimetricasfnwac.pdfIn PDF document text
    • http://rastet-malysh.ru/46765258631puc8q.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402504/normal_5fe59f3322673.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/jggjblQ/bushcraft_folding_knife_sheath.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzewekafan/dgcmDkj/zudefudodilexerini.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/Q6a6gdU/real_car_parking_2_online_mod.pdfIn PDF document text
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/zudasivefovato.pdfIn macro / runtime command snippet
    • https://dorubirema.weebly.com/uploads/1/3/4/3/134317311/ravunupunusapoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449187/normal_5ff43295e7c76.pdfIn PDF document text
    • https://votozugilom.weebly.com/uploads/1/3/1/0/131071295/6638eebf418593.pdfIn PDF document text
    • http://electorat.org/wutobukez6quhq.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/In macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 5040 bytes
SHA-256: 3d3b61853f28271ab1e43443803964e3d4960e4f73c249ee58158ef31c7ad7e0
font_01_sfnt_off0000f728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF728 9908 bytes
SHA-256: eaf020ef452ab7d229f1ea1d496a04836beac7abae4bf74a6611e58a2d5e5c5b