Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e6267306554efe…

MALICIOUS

PDF

88.9 KB Created: 2021-06-03 15:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02ddefd2a516c45fb38e1fd1c3ed2411 SHA-1: 81698415783579a155b8c7adff059f0151eee853 SHA-256: 11e6267306554efeff2dd0470aa46f480d952586ce275f8d2978fa02d8b07c1c
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://synerhu.ru/pbw?utm_term=how+did+alliances+lead+to+the+start+of+world+war+i PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417670/normal_5fd8cdc6c2cf2.pdfIn PDF document text
    • https://wiwufupa.weebly.com/uploads/1/3/2/8/132814928/vokiwi.pdfIn PDF document text
    • https://jamafijuzu.weebly.com/uploads/1/3/1/4/131437216/garegejatoxurowelav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369310/normal_6000a6e80a2b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_60185473430fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_6013930ac89fa.pdfIn PDF document text
    • https://wimiwimevodozaz.weebly.com/uploads/1/3/0/8/130874111/8636670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408881/normal_60512ce0bd45c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_604da4ce916b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476436/normal_5fd916f845946.pdfIn PDF document text
    • https://weziriditovi.weebly.com/uploads/1/3/4/1/134108838/1972f3aaf6cba76.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420761/normal_5fee9860625d5.pdfIn PDF document text
    • https://xegavepixax.weebly.com/uploads/1/3/1/4/131452872/zesiw.pdfIn PDF document text
    • https://fuloronarenor.weebly.com/uploads/1/3/4/8/134880411/6a4121d85e.pdfIn PDF document text
    • https://degobevotu.weebly.com/uploads/1/3/4/3/134393677/foferevimev-wefupiner-xowepunezat-xowuzixonenipuw.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://duziruromeja.pbworks.com/w/file/fetch/144498627/acne_studios_regular_fit_jeans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a8f1065-87bb-4967-a0a7-df23644428c9/kukajuxafibiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b6c369b-88f3-413d-80f0-9a53b413c10a/ejercicios_campo_semntico_6_primaria.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/w/file/fetch/144545289/abrasive_water_jet_machining_seminar_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb46563-c874-4213-bfaf-ee1b21cd33ea/how_much_do_it_cost_to_buy_a_pawn_shops_make.pdfIn PDF document text
    • http://jobojifitin.pbworks.com/w/file/fetch/144452127/introduction_to_airborne_radar_free_download.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_off00010fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEE 4948 bytes
SHA-256: 3915e148fdb27a84677fbf7f4c5deded36ca7c37bb61232c38d0a99de795f9db
font_01_sfnt_off000120c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C0 12016 bytes
SHA-256: e1492d1a6f9fc997ff799a992d96f73875a1ab99a87562256cf41cc18f2d5023
font_02_sfnt_off000147be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2