Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d722bb0655d485…

MALICIOUS

PDF

82.0 KB Created: 2021-04-05 10:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: eb73ff995790d09a32eafebc45f722ee SHA-1: 0379c4d21e2ecfe591ea702d9c66de8ffe422e1e SHA-256: 59d722bb0655d485bc8e52b35be0769fc6b3202327ff06bfad73fe2384347959
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm for SEO manipulation or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to movie songs and a URL that appears to be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=bodyguard+malayalam+movie+songs+free++123musiq PDF link annotation
    • https://jitolubupiloz.weebly.com/uploads/1/3/4/6/134637312/9779555.pdfIn PDF document text
    • http://gomakugagazeg.iblogger.org/gowatumonenolomo.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/sujuvutotabujor.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/4508362.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
    • http://gebaruzowulidus.epizy.com/importancia_del_bautismo_catolico.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/kabir_singh_all_song_wapking.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0ed6693-a56d-47a3-926f-628f3cda888f/what_are_the_9_principles_of_communication.pdfIn PDF document text
    • http://mawivevixovoxet.epizy.com/rifepibif.pdfIn PDF document text
    • https://184d393c-d2ff-49e5-bbcb-48626b1dbf88.filesusr.com/ugd/49be48_ce90e855d88a43f893680b3d62a03c0e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/878cfe76-8c87-459c-81bf-342ab54dea88/dizopakoguruxepe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b2e28f-600e-4820-9280-21bd60d5efee/wikefelururonekabumevoxuz.pdfIn PDF document text
    • https://5c2df1de-05ea-4e17-9aa3-38adc7ce3153.filesusr.com/ugd/ddd609_ffb659040f234db8bae12adc46fe9570.pdf?index=trueIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_b0e0e936def24ad98d1979a8d2dcc9f5.pdf?index=trueIn PDF document text
    • https://44eeb0f0-4dc9-4d8b-b3fd-cc7ace98e90e.filesusr.com/ugd/a083a1_22aec7f9074a4ee5806221098b30bdd2.pdf?index=trueIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_6e95fe90d4504da1a9164a46d91f329a.pdf?index=trueIn PDF document text
    • https://2702ba6d-c693-44a8-a508-54b36c816c16.filesusr.com/ugd/e745be_a9089b13f0d340a496aeeccb9bede4bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/lozegawizenufipubexew.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/char-broil_tru-infrared_2-burner_gas_grill_target.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_off0000f382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF382 5716 bytes
SHA-256: 9f78a008013e90b4a0a555972b1ddd76f410acb2614e39dbab170386d74e029a
font_01_sfnt_off000106e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 11080 bytes
SHA-256: 43c11a9921c42bea5a2d3818d6ce9bcda0004eac2b87272105c218f577ce4021
font_02_sfnt_off00012c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C89 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378