Malicious PDF — malware analysis report

Static analysis result for SHA-256 09a80fc9fe0b55bc…

MALICIOUS

PDF

79.2 KB Created: 2021-03-06 18:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 860b1dab51f27af657848fe494be1357 SHA-1: 11dad180263bd8277c9401ce942c1b5725ea99a2 SHA-256: 09a80fc9fe0b55bcbfbdb6c9e2f89086c9a1727ceabc6faa196b5907a7281195
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 0.9993

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://golowaki.ru/strik?utm_term=lg+top+load+washer+error+codes+oe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464301/normal_60406cc2ac27c.pdfIn PDF document text
    • http://rebituzugofebo.22web.org/61673120383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_603cc6ef2c1a0.pdfIn PDF document text
    • http://konovulibugu.iblogger.org/wenigekavekiwegozu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489734/normal_5fed3e9e7a1c4.pdfIn PDF document text
    • http://shop-profildoors.ru/what_is_nikki_giovanni_famous_fordrr1i.pdfIn PDF document text
    • http://habercigo.com/15750033100i654f.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/mamexaduzojav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485157/normal_5fd1ca2e3cd29.pdfIn PDF document text
    • http://awpmode.com/private_practice_season_5_episode_10_casto4whe.pdfIn PDF document text
    • http://byseles.xyz/latebefupugovuauts.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/8b3ffbd5-859e-418b-b352-8233ca5015e0/is_prodigy_membership_free.pdfIn PDF document text
    • http://kovobopejuwego.rf.gd/ti-89_titanium_wont_turn_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a95cc3-f6d3-421c-904a-94cbd278c310/13413993403.pdfIn PDF document text
    • http://juzobezakugov.epizy.com/29431776591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6090a14c-2d53-46e4-bbcf-1d0300359239/nesaduzuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ef584e-2c8e-4d2d-a5cf-a046b9d09db8/how_to_be_a_certified_pediatric_nurse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5bdbddd-a15f-4dd5-8617-5afac56a5ac4/18001558806.pdfIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_39045e66a7764fcf80eee2cbd6e3526a.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_c236ebc8acb34bcda6d992595f34e5b1.pdf?index=trueIn PDF document text
    • http://jepisaf.epizy.com/hallelujah_sheet_music_choir_free.pdfIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_5d97311a416a4f489cc5e1bd6c85fffa.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_37a1ca78cb4748c79e7ff6650b4756b2.pdf?index=trueIn PDF document text
    • http://zopimubusa.rf.gd/voxov.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f87c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87C 5368 bytes
SHA-256: 429ebad824a1d91f303d35460e0ec41b2b9d9389e9a981f7a7a8fa9a49da6a23
font_01_sfnt_off00010acd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACD 11044 bytes
SHA-256: 3a50fe32fa64e41378db517b44ee0471882693b5be1386ed4c60c08fb09d04e2

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