Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af6f260eb726490…

MALICIOUS

PDF

89.6 KB Created: 2021-06-10 04:07:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b4dda8180e3422c7bdbc71b0b9716200 SHA-1: 1647e387e1fe030728cfc167d72d51345d45bbdb SHA-256: 8af6f260eb72649024c26593eae68311939cb98ee35cfac859b1cccd1ad9ab9d
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The presence of a URL related to 'gta 4 trainer free download' in the document body and heuristics like 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a lure to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crewmak.ru/pbw?utm_term=gta+4+trainer+free+download PDF link annotation
    • https://vupavekana.weebly.com/uploads/1/3/4/4/134493500/dc63ee1b3.pdfIn PDF document text
    • https://jigokuzubunuk.weebly.com/uploads/1/3/4/7/134750148/kulakebi-fiwagimo.pdfIn PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/redasepedurutamekev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464851/normal_60be8495226a2.pdfIn PDF document text
    • https://mawikimame.weebly.com/uploads/1/3/4/2/134235565/1365637.pdfIn PDF document text
    • https://fedebeforejasu.weebly.com/uploads/1/3/4/4/134498020/veger_witubefamak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476927/normal_600d45673eb87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455898/normal_603d761744815.pdfIn PDF document text
    • https://dujejasafat.weebly.com/uploads/1/3/0/7/130739214/muwov.pdfIn PDF document text
    • https://gugibutuxu.weebly.com/uploads/1/3/2/8/132814167/nadivenotoxazed-matojuso.pdfIn PDF document text
    • https://babewepuk.weebly.com/uploads/1/3/4/3/134311046/9080678.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/6049997.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/07203719-a6aa-4e85-b7d4-2bc2813f60a7/examples_of_passive_aggressive_behavior_in_relationships.pdfIn PDF document text
    • http://bomasasawavi.pbworks.com/f/57194845215.pdfIn PDF document text
    • http://jijagenaneke.pbworks.com/w/file/fetch/144995745/dunerekovawuxukevi.pdfIn PDF document text
    • http://rimogeto.pbworks.com/f/how_to_study_beta_hcg_report.pdfIn PDF document text
    • http://fokurid.pbworks.com/w/file/fetch/144675360/husqvarna_riding_mower_yth22v46_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbd06fd6-88ae-45e3-af6f-97ec38d4bebf/40272382644.pdfIn PDF document text
    • http://sozegajamuf.pbworks.com/f/best_unholy_dk_pvp_talents.pdfIn PDF document text
    • http://kufepizerix.pbworks.com/f/sony_icd_bx140_digital_voice_recorder_manual.pdfIn PDF document text
    • http://vinivat.pbworks.com/w/file/fetch/144781293/diversity_in_families_10th_edition_free.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/w/file/fetch/144506676/explain_the_difference_between_formal_and_informal_risk_assessments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d42b9526-cd8f-42a3-be54-7427cd90e8cc/segaruger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea35dd4-eb93-40aa-8e7c-52166f707193/gospel_of_peter_text.pdfIn PDF document text
    • http://lufokomarib.pbworks.com/w/file/fetch/144467337/76225895298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16015c1-3b7a-4bf9-ae63-997a55c0c31f/what_is_in_bob_evans_sausage_gravy.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10586 4932 bytes
SHA-256: fa156d1b8c6dbe081981a09675bf1f6ac485955e7808a864d72d28e9c701d950
font_01_sfnt_off0001167f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167F 13800 bytes
SHA-256: 8dc02a47902cba1ac8e95cd205d22c44b33418639e95d02d8c6cdd12ad60e5a0
font_02_sfnt_off0001436f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436F 16096 bytes
SHA-256: 9853a4a918762215dfcba51349555ff48d39e56332efe18e2f333ca30d8a5b61