Malicious PDF — malware analysis report

Static analysis result for SHA-256 362579426b13013e…

MALICIOUS

PDF

79.6 KB Created: 2021-06-09 17:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 16f88448bf78e9628764a10d757e8d68 SHA-1: 6700778f0d822498d9bfea7dc1dffa070f730730 SHA-256: 362579426b13013e3a99c250e45b821806c76b889a33130350947f8e02ac8ca5
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The presence of a 'download button' lure and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The primary URL, 'https://crysiq.ru/pbw?utm_term=install+idm+full+crack', suggests a lure for cracked software, a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/pbw?utm_term=install+idm+full+crack PDF link annotation
    • https://mijolepeworid.weebly.com/uploads/1/3/5/3/135394353/fidezox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401517/normal_5fe62deaad162.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/pevomexanogime_zekiveko_rakinu_lufibul.pdfIn PDF document text
    • https://kukonugaxa.weebly.com/uploads/1/3/5/3/135327287/momejukikaja_nekazajosazawe.pdfIn PDF document text
    • https://devatokur.weebly.com/uploads/1/3/2/6/132683056/xekarabugefewolawuro.pdfIn PDF document text
    • https://kabirajozef.weebly.com/uploads/1/3/2/7/132740353/2f5ef.pdfIn PDF document text
    • https://zoziwaxixu.weebly.com/uploads/1/3/5/3/135316133/jeratuzu_wofodij_nunonuzobo_xowedelale.pdfIn PDF document text
    • https://bodujifoji.weebly.com/uploads/1/3/5/3/135394102/dowokutapamoxew-rezekipisetep-dosego-sigelatozazeza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471958/normal_6045e984d7a76.pdfIn PDF document text
    • https://mejepizejuv.weebly.com/uploads/1/3/4/5/134528376/1695368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491705/normal_5ff30ce0dfa65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471960/normal_5fd660a87d735.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
    • https://uploads.strikinglycdn.com/files/a2e853f2-7d01-458b-95f3-487adf9b2620/reply_1994_ep_1_eng_sub_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f7bd1c2-be14-43a5-8e9b-8ea73bce4801/what_is_the_national_peer_review_committee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2ccf094-c2b9-4cb2-8cd5-151c459991f8/47285657492.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9d217a-3702-496d-85fb-a749dd57deab/60502536215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65c47e7-23b3-4cf6-b590-929f8463de14/what_does_chs_stand_for_in_medicine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb41c50-1947-4cd6-99cc-11b60f478451/how_to_install_honeywell_wifi_thermostat_rth6500wf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88cb21b7-7936-489c-b709-739c0f71d07c/how_to_use_fonts_on_cricut_design_space.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67c27a1f-38b1-4bf0-934d-b84747072a9d/45900006990.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6920a00d-d1ca-4da2-a2b6-6370ac109c7c/13645198223.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87773ba5-65c4-487e-9b95-2216b9195b5c/download_greek_and_hebrew_bible_dictionary.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_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 4824 bytes
SHA-256: f904e6f46b009b1a3043a48673eb78e7ba744f9abf9a56a8deabec7894db5e07
font_01_sfnt_off0000fdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC3 10988 bytes
SHA-256: 06ae9f404b4409075c6d1e900eea32a3cef5ea8191dc1d23fdf8777a8c595b14
font_02_sfnt_off00012343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12343 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2