Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e143e30121d372…

MALICIOUS

PDF

74.9 KB Created: 2021-06-10 20:30:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 45c19e0566dbf1e371de48343d62ed63 SHA-1: 32f81bddc44861e5113b8f29e3fa49996140ee21 SHA-256: 49e143e30121d372124b53e9ca0b69e29b239565c04cb9eb3b881a63cbbfc94a
226 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm designed to redirect users to external malicious content. The presence of numerous external links, including a link to "garglob.ru", and the ClamAV detection as "Pdf.Phishing.Trojan" strongly suggest a malicious intent. The document's structure and the high ML classifier score further support this assessment, indicating it's likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://garglob.ru/pbw?utm_term=swamp+attack+cheat PDF link annotation
    • https://fuzaterolipi.weebly.com/uploads/1/3/1/4/131438829/054fea5f63e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_6060320316036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416504/normal_5ffe11207386d.pdfIn PDF document text
    • https://fivujage.weebly.com/uploads/1/3/4/3/134316273/3910829.pdfIn PDF document text
    • https://bevufifebuseve.weebly.com/uploads/1/3/1/8/131855995/1490516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_600a44d470740.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_603e3de8239d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413019/normal_5fc8c7b247ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404739/normal_602edfeca9e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_6052e69415fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_60c13050597d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_6057eda375d24.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikipudojuzo.pbworks.com/f/skyrim_best_potions_to_level_up_alchemy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff585ea5-3086-452f-9e1d-a114e01f179e/microsoft_volume_licensing_login_error_code_e06.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/w/file/fetch/144424191/how_to_emcee_a_7th_birthday_party.pdfIn PDF document text
    • http://joraxakegeg.pbworks.com/w/file/fetch/144897591/wunexaxotexijod.pdfIn PDF document text
    • http://siruzosu.pbworks.com/f/best_ps2_bios_for_pcsx2.pdfIn PDF document text
    • http://busututesemo.pbworks.com/f/pebobemos.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/w/file/fetch/144549375/teste_rapido_para_saber_qual_faculdade_fazer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b562cdab-b0fa-4974-b585-186c2c3cc066/63746537931.pdfIn PDF document text
    • http://lagawiwefe.pbworks.com/f/me_and_the_key_2_level_19.pdfIn PDF document text
    • http://binovilijire.pbworks.com/w/file/fetch/144804435/waledejabiziw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d54a6dd-aaa5-4bcb-9220-01d89abacc5a/how_to_properly_write_a_quote_from_a_book.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 5124 bytes
SHA-256: 7d3bdec4b47488dd16388c46a06fa14277ba20e6b815a18a8b48769db8acf91b
font_01_sfnt_off0000fb57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB57 10164 bytes
SHA-256: 7adb2a435459a8749baf90fa0b4e4d26bae807d726e297c1e3ac4544da562861