Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbd79379a4735a0…

MALICIOUS

PDF

79.8 KB Created: 2021-03-12 05:14:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f297cede8938402ddad078d7efecd524 SHA-1: 74c255c71f711753ad51dc9f0a088f177fec0912 SHA-256: afbd79379a4735a026669664f126154a3cee86beef1fc9b51bdfcc83ab473a72
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://crophysi.ru/123?utm_term=adjective+worksheets+6th+grade+pdf PDF link annotation
    • http://sifaritube.sportsontheweb.net/wixaxufitoxulewew.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/hifijhh/dragon_quest_tact_review.pdfIn PDF document text
    • http://pegijegur.mygamesonline.org/how_many_trades_can_you_make_without_being_a_day_trader.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/dRjitON/wuwuparazoduba.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/drawing_flowers_book.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/htVEJW9/40966411016.pdfIn PDF document text
    • http://nuraramibifowom.22web.org/welowegojolivodatazeni.pdfIn PDF document text
    • https://cdn.sqhk.co/dufadafakuti/gghcLid/can_you_translate_words_in_a_picture.pdfIn PDF document text
    • http://xemokajoled.medianewsonline.com/49417697211.pdfIn PDF document text
    • http://juxoxelobonoje.22web.org/piduvuxakomagijaja.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/nike_trainer_socks_size_guide.pdfIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_5edef5232945412eb8df9379a418cc3a.pdf?index=trueIn PDF document text
    • https://0cfe495c-9a5f-46a1-a5f3-fb21b6211bac.filesusr.com/ugd/7aabb2_0ebb11fef10841f7a75b90ad70d4afb7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8bad8d-548a-4cf9-8424-011169329503/matlab_function_syntax.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_5f00b0af5f18417aa78a78934060c2fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/65757308-29ed-46da-8ff8-c76c8db1bfca/35814994171.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/59459880061.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/fukojuvuza.pdfIn PDF document text
    • http://xedonufil.rf.gd/hungry_shark_apk_mod_unlimited_money.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF963 5820 bytes
SHA-256: 00a57a686d85d1a47310d8c83a02feac20422e2dc869657c0cf8af539f174303
font_01_sfnt_off00010d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D50 10760 bytes
SHA-256: a6f2e93b152b0fa7c5345eafb235a90bcc4e1ec729d02d09b6d862f5f8556b3d

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