Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e78c430bc5f0b3e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-25 04:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 1de98bb471b364419941632958e8a322 SHA-1: 65c42dc9ef0bff5bfb1c22ea3fb211bd4669e2b1 SHA-256: 8e78c430bc5f0b3ec8b07c9381c26be3c8dd1de6cf9fca024ab30d20f171cf13
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm designed for SEO. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the PDF structure strongly indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=ars+poetica+t%25C3%25BCrk%25C3%25A7e+pdf PDF link annotation
    • http://gexopidikimo.mygamesonline.org/how_to_login_into_your_icloud_account.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/1836fa52.pdfIn PDF document text
    • https://cdn.sqhk.co/pagupuxu/5tgheJp/kojanifokigoli.pdfIn PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/giOrM9C/xekerazizubofebikivo.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/0qSghha/45326888665.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/bazonufexa-wisemi.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/27424628917.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/gfgiehb/50791943158.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/the_beautiful_game_podcast_hosts.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/nutamudimowodani.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/BBgeRs0/conspiracy_palette_price_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/hjb3Yih/pac_man_costume_ideas.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/ec952cce-c15f-4d7e-96f3-ee3991127cdc/what_does_azimuthal_projection_mean_in_geography.pdfIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_f2f867f795244b2cab144e11b7a12395.pdf?index=trueIn PDF document text
    • https://d4078116-a2d5-466f-97e6-20d899f6ca30.filesusr.com/ugd/576447_85b397ab99664a78bb60fc4aed6cd229.pdf?index=trueIn PDF document text
    • http://neketepa.myartsonline.com/mexaporuvonasewino.pdfIn PDF document text
    • https://2a497570-3881-454f-aefc-229a18bbdf22.filesusr.com/ugd/83e24f_243a9b75992745aebdde69a2fb7b1c0c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4be553a6-f2db-4ec9-be8f-71205e9f53b9/50_ways_to_leave_your_lover_drum_sheet_music.pdfIn PDF document text
    • https://a50dbba5-e4fd-40cc-afa9-a45495a5accf.filesusr.com/ugd/7f929b_f0e16cadf3d441cca4e49e015097950b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c271e7f4-5624-4daf-ac1a-93dff1831ce2/12205841994.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_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 5472 bytes
SHA-256: 2d34684e5968d49d0ddd63a7a5de065a807d1c55dc295f376c9b7033c176d172
font_01_sfnt_off0000fd43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD43 13312 bytes
SHA-256: 52b4149461eb669cd5f7c75854c71b3f576149d103939b7f5d405115792c99ba