Malicious PDF — malware analysis report

Static analysis result for SHA-256 11d04ef71593fd22…

MALICIOUS

PDF

80.1 KB Created: 2021-06-14 06:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7d1f3a62176a8b2511c07d2d1665b7c6 SHA-1: cf04734e48915fa4b1e89a63bd3c782bdfd6537d SHA-256: 11d04ef71593fd222379d41c77101e1f0b6cdc0917ea439cbde8b39813bc9425
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/pbw?utm_term=bhagavad+gita+sanskrit+english+pdf PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4411245/normal_60afe9da7ce59.pdfIn PDF document text
    • https://wawurekufa.weebly.com/uploads/1/3/4/3/134322490/xadubixevamoj-wetenosuze-kezutitopisema.pdfIn PDF document text
    • https://gununoneku.weebly.com/uploads/1/3/4/3/134309052/riboli.pdfIn PDF document text
    • https://lonaxixa.weebly.com/uploads/1/3/1/4/131413275/vepijexoti-rorus-jujapanowires.pdfIn PDF document text
    • https://wagidojinubem.weebly.com/uploads/1/3/1/4/131438567/8939348.pdfIn PDF document text
    • https://razerufuvekon.weebly.com/uploads/1/3/7/5/137518330/79a114d4363d3c5.pdfIn PDF document text
    • https://somejenever.weebly.com/uploads/1/3/4/3/134385140/a2dbb25c5da.pdfIn PDF document text
    • https://begakidiwadagav.weebly.com/uploads/1/3/1/3/131397934/vutolav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487423/normal_60b9f9988c3bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_6007ab744543e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_6069f6e7008ba.pdfIn PDF document text
    • https://zelivetatop.weebly.com/uploads/1/3/0/8/130814581/8707680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481154/normal_6054b6192d33c.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://bunemirudezo.pbworks.com/w/file/fetch/144918363/visa_invitation_letter_template_usa.pdfIn PDF document text
    • http://wotasaful.pbworks.com/w/file/fetch/144737079/how_to_relieve_a_groin_pull.pdfIn PDF document text
    • http://kidigifonixo.pbworks.com/w/file/fetch/145001784/jules_henri_desfourneaux.pdfIn PDF document text
    • http://jubujefaj.pbworks.com/w/file/fetch/145090170/fubilalifakon.pdfIn PDF document text
    • http://xetuduju.pbworks.com/w/file/fetch/145253973/pixel_gun_3d_hack_gems_and_coins.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144641025/haier_washing_machine_repair_manual.pdfIn PDF document text
    • http://dewepun.pbworks.com/f/kinematics_worksheet_with_answers.pdfIn PDF document text
    • http://kivotin.pbworks.com/f/48361176008.pdfIn PDF document text
    • http://jabodawo.pbworks.com/f/tom_ve_jerry_2021_trke_dublaj_izle_jet_film.pdfIn PDF document text
    • http://wotasaful.pbworks.com/f/tonupugoxamuxibujele.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_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 5156 bytes
SHA-256: aec114cb72fccbae056017aa884948f865b86d0633383acaad4617af18aa4676
font_01_sfnt_off0000fdc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC8 11504 bytes
SHA-256: 2990c74ae6a1c73e3c4201f046298259a9a1cccf64d0a38c8c8e1afe5e019863
font_02_sfnt_off0001245d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34