Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e7669cf24fcc47…

MALICIOUS

PDF

79.3 KB Created: 2021-03-24 15:48:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f66e1d6fd5daa73d84deb1290ed51b4 SHA-1: 753711c5b9d86d1aaf1358cbb387cc8037f24e15 SHA-256: c2e7669cf24fcc470eddeadad75ef5ae8e64e7f2a7325ae9bcaa20ef7a7f1401
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 0.9998

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://vilenefex.ru/strik?utm_term=how+to+clean+drain+on+front+load+washer PDF link annotation
    • http://novonet.online/latest_call_of_duty_xbox_one_xscph0.pdfIn PDF document text
    • http://strita.space/th8_upgrade_guide28v0a.pdfIn PDF document text
    • http://iminn.ru/taposipexinedesagikafipt7fl.pdfIn PDF document text
    • http://kismykeitio.best/takoruxinefaitzjc.pdfIn PDF document text
    • http://itdomen.fun/mopezaribileduzbw59k.pdfIn PDF document text
    • http://jefopojat.iblogger.org/gositazamepuxoname.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
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_9fc8ccca25164e0a9a52dda209808b2a.pdf?index=trueIn PDF document text
    • https://0b21792c-a699-4cf4-8833-5910c6ad58af.filesusr.com/ugd/b0b521_20be41fc59464523b0290517e85a7c5f.pdf?index=trueIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_c71c037b9068451f8c51a2ff27e59c13.pdf?index=trueIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_9bcf41602a044534bf425665a6830174.pdf?index=trueIn PDF document text
    • http://nawexox.epizy.com/99310179830.pdfIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_ba5522ca157c4912b40101fc0fcc5673.pdf?index=trueIn PDF document text
    • https://327bbe42-9aa5-4ca0-80e5-6c9857058a26.filesusr.com/ugd/2b870b_abd8530e1bd142f59e68350fd9d67520.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_680240b5c0ac4f5b8663c73cf3fbc609.pdf?index=trueIn PDF document text
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_2989bb2948c14ec3b66844835ac2b634.pdf?index=trueIn PDF document text
    • http://kizuwopo.epizy.com/x-core_hunter_app.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/how_to_change_algorithm_on_delta-q_charger.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/23136959223.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/39706984717.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_2c3f4157adc44f1589a76f798794f6bc.pdf?index=trueIn 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_off0000eb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8F 4948 bytes
SHA-256: 9f87e2a00b63f6feffbb9db5d1f4841289790e9656f1f7abf5d44b158771303f
font_01_sfnt_off0000fc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC5D 11048 bytes
SHA-256: bf90d1289480b54d1409a14a70cdd10168a3ab4ef44b19500c7b9868350394dd
font_02_sfnt_off000121dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121DC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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