Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ba29a68438181ee…

MALICIOUS

PDF

84.1 KB Created: 2021-04-04 00:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7e5419e665764e63a10cf1760388cc76 SHA-1: 99f057e2149ab647b0e32b840e89548629f05848 SHA-256: 9ba29a68438181eea9c370fc9a1c679dc8e1729d480176a244c24c0d6f890d6c
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/strik?utm_term=how+to+pass+12th+physics PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365649/normal_5ffc8009db4ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457272/normal_60055d859206f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466166/normal_600955b15d1c8.pdfIn PDF document text
    • http://stopnutristrike.ru/narrative_of_the_life_of_frederick_douglass_chapter_1_questionsuflvg.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/simijogukodu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_60199db8c26e8.pdfIn PDF document text
    • http://batmbatm.ru/new_bhakti_dj_song_2015k0n8g.pdfIn PDF document text
    • http://kalides.22web.org/sapizafinavuve.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/abbyy_flexicapture_user_guide.pdfIn PDF document text
    • http://ninozefumuwu.iblogger.org/aiou_assignments_answers_1423.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_603eb6015a5fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407983/normal_6025c1170d3ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464734/normal_602270f5f0919.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444117/normal_60179250d12d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_60532ce3a69c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393637/normal_5fd8aec6e2a2f.pdfIn PDF document text
    • http://javebamugizal.66ghz.com/54516000108.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/vitokomamaronodejosepozuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukezodebas.onlinewebshop.net/23386424724.pdfIn PDF document text
    • http://pokizepifowuw.epizy.com/rokexesu.pdfIn PDF document text
    • http://tigodovujoxam.rf.gd/72384402813.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/humana_referral_authorization_form.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE54 5232 bytes
SHA-256: 1fda5869f3297c87db60ad8b66a74755b1d54e9e350374b664ec4c6128c27dbe
font_01_sfnt_off00010039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10039 1736 bytes
SHA-256: 2d4ebdd077451f27cc4226fdebef3915a1fd31139810f8d5ebae088ec2adbe5f
font_02_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 10732 bytes
SHA-256: 56b190193b7e01dedbc43197167a5b4dd89c1c43fe364c8ab69162a639f2db66
font_03_sfnt_off00012d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D88 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61

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