Malicious PDF — malware analysis report

Static analysis result for SHA-256 50db88f148beac9f…

MALICIOUS

PDF

74.1 KB Created: 2021-03-29 11:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cc8b66a08c0cebf271d36e354205a864 SHA-1: 2198930405184ce3c535d007700056fe133df3e9 SHA-256: 50db88f148beac9fe2af9bd7a7456ff37ed766d1b66ff4db525fc5eeb16f9782
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting or suspicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a common phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://dugedepap.ru/wix?keyword=megumin+body+pillow+shopee PDF link annotation
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/6341039.pdfIn PDF document text
    • http://familyit.info/warship_craft_hack_ios_downloadgyh3m.pdfIn PDF document text
    • http://djami.ru/61527897914dpv7m.pdfIn PDF document text
    • http://fartook.online/how_to_help_borderline_personality_disorder7zwwz.pdfIn PDF document text
    • http://lobotazawarew.iblogger.org/oprah_winfrey_on_wayne_dyer_death.pdfIn PDF document text
    • https://jotajawe.weebly.com/uploads/1/3/1/6/131606146/begifawese.pdfIn PDF document text
    • https://gupijevud.weebly.com/uploads/1/3/1/4/131407369/5609885.pdfIn PDF document text
    • https://zowobisa.weebly.com/uploads/1/3/5/3/135313501/726d216dead.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5feb970e52d40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495265/normal_600f625cbd959.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_605910251b0c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369920/normal_5ff0cac7863ea.pdfIn PDF document text
    • http://medicinfo.online/procol_harum_homburg_piano_sheet_musicjk6rh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_600c903276b98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jonebitomire.rf.gd/belling_oven_owners_manual.pdfIn PDF document text
    • http://paborijobo.epizy.com/72161119215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff126da8-e11a-4eb0-b134-9f8de42cb166/61209270132.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/sixok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a247d161-4bd8-49df-8999-5e0ee2b24b1f/58746028056.pdfIn PDF document text
    • http://rinifujojutot.epizy.com/30347296832.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD972 5208 bytes
SHA-256: c03ec5b9f79723d7a3bb892a18a32923c45df2be6b56ffad87a6e0e565c747f1
font_01_sfnt_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 9980 bytes
SHA-256: 6725dd4ae31447357de10daedb1a0c4260d93df786e499433d9b94af6ab1dbff
font_02_sfnt_off00010d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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