Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa64855b8d98562…

MALICIOUS

PDF

79.4 KB Created: 2021-05-15 10:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 95aa708ee91652a947a7892581498445 SHA-1: 3ca86acc26029e66beb29f7c05b12efd433994e2 SHA-256: 6fa64855b8d98562381de495f711f700247b1f4ddc3345bcebdb0d1396a9eb96
244 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, and contains a large number of embedded URLs. One URL, 'https://crophysi.ru/strik?utm_term=holy+anointing+oil+recipe+bible', is flagged as a malicious redirector. The document appears to be a link farm, likely intended to direct users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=holy+anointing+oil+recipe+bible In PDF document text
    • http://detelibizonibi.22web.org/the_game_baricco_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/kirovuwuvo/EsihNr9/vixutinojugezexo.pdfIn PDF document text
    • https://nusiteraj.weebly.com/uploads/1/3/5/3/135347212/2f183562b.pdfIn PDF document text
    • http://kisegojunu.22web.org/kowirixoduwibamevi.pdfIn PDF document text
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/mifop_laludevidulepi_zugurilivub_gezufow.pdfIn PDF document text
    • https://cdn.sqhk.co/nudofarus/hihbdVS/nhl_standings_2015.pdfIn PDF document text
    • https://cdn.sqhk.co/gotirawuz/jtjbhj2/hard_boiled_eggs_instant_pot_555.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/hjRjije/3756996378.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/1b128b3a95b42.pdfIn PDF document text
    • https://radogatibemif.weebly.com/uploads/1/3/2/8/132815767/2420023.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://235a1a37-2bc9-4d3b-8f1d-d3952ad9fba8.filesusr.com/ugd/3111f7_c9ea27a587414727898ba76f2aeb65b8.pdf?index=trueIn PDF document text
    • http://sevavaxup.rf.gd/basic_english_communication_lessons.pdfIn PDF document text
    • https://e7e1611e-f78d-4dfd-b5ce-3be5f579732f.filesusr.com/ugd/4b76a6_24660ec9e3ca490398264f3eeb055d63.pdf?index=trueIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_a44362ef9c6d445a90fb141d749b765d.pdf?index=trueIn PDF document text
    • https://3926d074-74ab-41cc-aa9d-340192ccda4e.filesusr.com/ugd/5619e7_6212b4c9601a457cb1f5b8346651fc38.pdf?index=trueIn PDF document text
    • https://6754c94d-8795-460a-880d-d127bb37d4d4.filesusr.com/ugd/2383dc_3f6b55209a6a4eceac0e43e19f429b1f.pdf?index=trueIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_0b7bb76fae9641e498651c3f0c181f61.pdf?index=trueIn PDF document text
    • http://mavojowegumod.epizy.com/bruch_in_dezimalzahl_aufgaben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db18b2ed-5c99-486f-a17b-c7069fa061f6/96198124572.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_8222cd69b6024cc4bbedbb6270394a21.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef0d62bc-bdbc-49f1-b790-dadbe5c15a31/zixezozizivezezi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf15caf1-13bc-4a7a-8968-2b84a5f5c28e/79350349479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e35b9997-9c92-4df7-a044-e0a80790581a/48461361877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44083bd9-9eae-486c-855b-82b247c5d863/when_did_total_gym_come_out.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_3e9c4615f63148e4aaf8dbdf1a34e9e2.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_dd9bb3a4576742b395ba1bc00e15db5d.pdf?index=trueIn 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_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 5128 bytes
SHA-256: 2dec8d6d65ddf389f5137c26a1ae306864df5d23b8275bc654d08ba6b7f09c93
font_01_sfnt_off000109b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B4 11208 bytes
SHA-256: b80e194e82183dc70cb5786bab12d3d1488815ab4fae959305c6ce62063e6342

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