Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63bb82414cd268e…

MALICIOUS

PDF

76.5 KB Created: 2021-03-18 07:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c8b41529c0355619dd7c3dca98952c03 SHA-1: 0fdd3e6586f8e1d58b157bf92e82816871dea5f9 SHA-256: a63bb82414cd268e2a54fbc71ab6ee150996c296463954e2218f1b8f0698ae2c
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external links, many hosted on disposable domains, suggesting an attempt to manipulate search engine rankings or redirect users to malicious sites. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall structure and URL patterns indicate a phishing or SEO spam attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/award?keyword=automatic+traffic+control+system+pdf PDF link annotation
    • https://cdn.sqhk.co/dojerilu/hBhjKhe/raginuroli.pdfIn PDF document text
    • http://sijemogezabusa.sportsontheweb.net/sefebomer.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/daSijhj/ice_rage_hockey_mod_apk_android_1.pdfIn PDF document text
    • http://radogomi.mygamesonline.org/english_learning_books.pdfIn PDF document text
    • http://nukicew.xyz/powerflex_40_fault_f081024za.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/dpife8x/3d_archery_range_near_me.pdfIn PDF document text
    • http://servisvds.ru/85727679311salcd.pdfIn PDF document text
    • http://thrivewebs.com/hero_xtreme_200s_price_in_guwahatiwsqmm.pdfIn PDF document text
    • http://vodizurulenega.mypressonline.com/runedorotogutematorako.pdfIn PDF document text
    • http://kersita.space/alcatel_pixi_4_firmware_freetfpcv.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/8179689936.pdfIn PDF document text
    • https://cdn.sqhk.co/ronelejibir/2hhichc/jotunobozobarobasulapow.pdfIn PDF document text
    • http://manovina.mypressonline.com/dulimaxej.pdfIn PDF document text
    • http://mosquito.codes/vixuteruzesazar7hjbj.pdfIn PDF document text
    • https://cdn.sqhk.co/bogabixexuja/haUgfij/dasur.pdfIn PDF document text
    • https://cdn.sqhk.co/fojufifef/iqGnHia/makanexiv.pdfIn PDF document text
    • https://cdn.sqhk.co/nubenirosife/hctE5p2/mopivixowavepulapeter.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/jjHqOyr/menunasadime.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_e6dc8c1059f84be0914ef9b8e1b24fb0.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_e1ff9d311be74c33b5c12b1dc0c98a03.pdf?index=trueIn PDF document text
    • https://e79dab91-b8ca-4f03-a7cf-74564eaa1d8a.filesusr.com/ugd/009cd4_7aeb7994706d416fb92c9df7771e849e.pdf?index=trueIn PDF document text
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_8bb84c13ee764cce85619b44dedf4458.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_ba646038274f42568e99b40abfb1310f.pdf?index=trueIn PDF document text
    • https://19eae752-0dc2-40b2-988a-3ead9c543f91.filesusr.com/ugd/dee0a8_4ff6d1367df247e983fe4f42f5dd0c64.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEC 5392 bytes
SHA-256: 6840e1d45818ad41396c54eef37a0e25438f6a94b30971e0642325529eb48760
font_01_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 11328 bytes
SHA-256: 508fc6c93b276c0f6c97b6a78245026a586037fa62b61cecbeee53fc4ddb2285