Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80c95661c9bb312…

MALICIOUS

PDF

78.5 KB Created: 2021-04-14 04:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a061551ee59aef3098df4a3fe89840a2 SHA-1: 30254bcbe80934e43af24fb0a5f412913c869590 SHA-256: e80c95661c9bb312db9deae2310db371865977accaf33b49c93decfaece1bdac
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains text related to 'penny stocks', aligning with the URL's 'best penny stocks 2021' query parameter. The primary attack pattern involves directing users to potentially malicious or scam-related websites.

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://fokemale.ru/strik?utm_term=best+penny+stocks+2021+under+%25241 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475572/normal_600efc4d63005.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/igOdNr3/playstation_store_card_25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_60316998d15bb.pdfIn PDF document text
    • https://bilafewutugu.weebly.com/uploads/1/3/4/6/134619215/naxibulenax_badagojememep_ninurenipibutak.pdfIn PDF document text
    • http://yognat.space/target_compound_bow_stabilizer_setup2g4ar.pdfIn PDF document text
    • https://gogabaxada.weebly.com/uploads/1/3/4/8/134852864/ziwuzowafexodi_merulubopob_zodokefolusino.pdfIn PDF document text
    • https://cdn.sqhk.co/naveropifo/jejjgj6/sunaf.pdfIn PDF document text
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/411742.pdfIn PDF document text
    • https://dosolixegu.weebly.com/uploads/1/3/4/3/134340741/211bf.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/fanevula_noxovuba.pdfIn PDF document text
    • http://hhizmet.com/christchurch_earthquake_survival_storiesdke5n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_6025ac9564f88.pdfIn PDF document text
    • https://vujajewuriwox.weebly.com/uploads/1/3/5/3/135387523/70bbf74.pdfIn PDF document text
    • https://morisefomu.weebly.com/uploads/1/3/0/9/130969566/372044.pdfIn PDF document text
    • https://cdn.sqhk.co/kawurefeki/ffOjajf/tamil_movie_box_office_collection_records_all_time.pdfIn PDF document text
    • https://melezejezoman.weebly.com/uploads/1/3/5/3/135383670/panipixerixuwap.pdfIn PDF document text
    • http://meine-gebuhrenfrei.com/resumen_del_libro_la_revolucioncitac4djr.pdfIn PDF document text
    • https://faniwavuguvupos.weebly.com/uploads/1/3/4/4/134478403/mewanotunaw-xutujiza-pazunagadabupok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_60684cbb3a72f.pdfIn PDF document text
    • http://arnautmebel.ru/how_do_i_use_the_speakerphone_on_my_doro_7050lus5g.pdfIn PDF document text
    • https://tazuwadafif.weebly.com/uploads/1/3/4/8/134857375/junukosero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ed42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED42 5604 bytes
SHA-256: a3649e454010f2979762eecd02f9117ac5c1d27922c136eea416e7732f9e50d2
font_01_sfnt_off0001008a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008A 13304 bytes
SHA-256: f1b0d56ed5a015e91c73a721a12778b43a43835540f7166fb6130ecaad237dba