Malicious PDF — malware analysis report

Static analysis result for SHA-256 0471261d14d9b9e9…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 12:25:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ae6c244c0e180af16308ba8ce3859955 SHA-1: 90eb68db2080c0c668f2308784b52ca844a54bd9 SHA-256: 0471261d14d9b9e9e5a9d54f932837c9aab32fc3c70f567891dbfea92b9122dd
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://dafemum.ru/wix?keyword=raft+wars+apk PDF link annotation
    • https://cdn.sqhk.co/tejikeluz/jeWodrI/warrants_city_of_dallas.pdfIn PDF document text
    • http://pipopituga.22web.org/welsh_national_anthem_lyrics.pdfIn PDF document text
    • http://kazedoruredupe.22web.org/bougainvillea_flower_information_in_marathi.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/jc2yjeh/guvane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_60126a1254c63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378846/normal_5ffd54a9d4cf1.pdfIn PDF document text
    • http://kexagatedonekun.iblogger.org/11737215846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469849/normal_60525f1ea104e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386605/normal_60046bc173385.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/rihg1jg/lethargy_meaning_in_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/jemLgeO/74857924961.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/RDMjhft/64694395978.pdfIn PDF document text
    • http://judijemavup.22web.org/52297706873.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490371/normal_5fe055a4aa9c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dff05eb-e594-4851-8715-d612ab6b932b/autocad_2d_and_3d_practice_drawings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91efd53c-5db3-441a-b09a-90bbb3c89d53/rakovukifepag.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_70a47009a7464c3cbed8a8f94860b3f0.pdf?index=trueIn PDF document text
    • http://dojeguxe.rf.gd/wawerife.pdfIn PDF document text
    • http://vukefuxi.epizy.com/witazodenoruju.pdfIn PDF document text
    • http://wiroweri.rf.gd/what_instrument_is_used_to_measure_temperature_brainly.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_9ae059e1dcd74b8f8106c8e3229acb04.pdf?index=trueIn PDF document text
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_aee73c9edaa1453b82f89defc0cb96b8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/98e489e8-1b27-4687-a2f3-fd14b0eabb23/67966937761.pdfIn PDF document text
    • https://80172413-d145-4b71-b7cf-4a007d76ad29.filesusr.com/ugd/cacfd7_bee805417fe04e878e01110b4516f1fc.pdf?index=trueIn PDF document text
    • http://sudebavegubud.epizy.com/how_to_learn_about_investing_in_penny_stocks.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_off0000df19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF19 3016 bytes
SHA-256: d9b558bfb6ffedc38bb3e15f1f5cf07cc4e60a8ad763b7ec4e2f48334709651d
font_01_sfnt_off0000e9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C0 5024 bytes
SHA-256: 755d0b22eb0b3766f4473933802af30850630720cfb0af964df02655c5b665e9
font_02_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 14168 bytes
SHA-256: 1b8b9ed1287f49e43296ce7d3e620003641e07ff66812af2de9d4629524c2945