Malicious PDF — malware analysis report

Static analysis result for SHA-256 8001e61c525fa26a…

MALICIOUS

PDF

79.1 KB Created: 2021-05-26 19:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cf596e9fa6312fd7b85a91a4a35f719a SHA-1: 7795be6a0b61dd9ac49713278a1ced2b4081b8ed SHA-256: 8001e61c525fa26abcc13c48c4fe04808478df248f6777412c73db288739e734
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary URLs, 'https://xajibur.ru/strik?utm_term=what+rosary+do+you+pray+when+someone+dies', is likely a redirection point for further malicious activity. The presence of embedded URLs and the nature of the link farm point towards a phishing or malware distribution attempt.

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://xajibur.ru/strik?utm_term=what+rosary+do+you+pray+when+someone+dies PDF link annotation
    • https://bupawajeba.weebly.com/uploads/1/3/5/9/135956748/43b209322.pdfIn PDF document text
    • https://serinuvof.weebly.com/uploads/1/3/3/9/133997237/murutigiwuk.pdfIn PDF document text
    • https://wabozejitikaz.weebly.com/uploads/1/3/4/4/134495441/e9011f0ad.pdfIn PDF document text
    • https://saxipapes.weebly.com/uploads/1/3/0/7/130738636/74c00c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5fd201289d393.pdfIn PDF document text
    • https://sadibagisu.weebly.com/uploads/1/3/4/7/134758630/makajivajunepisemop.pdfIn PDF document text
    • https://rodinesupogoj.weebly.com/uploads/1/3/1/3/131384539/zujuxumiseru_lagejesidezuj_miwonumofotanaf.pdfIn PDF document text
    • https://xuwejemeluk.weebly.com/uploads/1/3/4/3/134314543/b8a6c49fc5b2481.pdfIn PDF document text
    • https://dijitisabotiji.weebly.com/uploads/1/3/5/3/135324222/98358ec036a.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/lapebeguketemizoba.pdfIn PDF document text
    • https://larigagip.weebly.com/uploads/1/3/4/8/134887586/715fd73ac7d783.pdfIn PDF document text
    • https://nivagevap.weebly.com/uploads/1/3/1/4/131438423/zanibi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459784/normal_605421006f17b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459060/normal_600fe655b0cf6.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/aa9260c4-40a0-4d09-883c-24abd32b660b/2021_codes_for_arsenal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/829fc5e6-1181-4b31-acd9-963ce2757f8d/how_long_to_get_a_default_judgement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0195f3-dec6-410c-b589-c869b5d5bf64/44795768554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab307060-d782-43a0-a65b-496f874ea22c/littlest_pet_shop_2.2.1_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ac34a1-e91f-480d-9d89-69a5b59dbbb1/why_do_i_get_blind_pimples_on_my_forehead.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7c16ac-aff4-4dc8-a4c6-3f5f75cbfaad/dnd_5e_warforged_cleric_of_the_forge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789743c7-1619-4dc2-a28a-7906ead17a7c/gear_circle_bluetooth.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 5256 bytes
SHA-256: 479d0d8e03573cf373648f6eff16cc6f5fbad8469e53ec5d7c9a0a18d55c5038
font_01_sfnt_off0000fc67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC67 10496 bytes
SHA-256: a92649aa67184bd82089d934c79643e36433d659a2ab51a943109ad90f08cd46
font_02_sfnt_off0001206c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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