Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9bd93ff4a339dd…

MALICIOUS

PDF

65.1 KB Created: 2021-03-06 00:29:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 031723513bd1590cedd44864efa79646 SHA-1: 7258d28afaaa01ddd787adc2cf48b0fb61670ce5 SHA-256: 3a9bd93ff4a339dd5480745bd2742d2ee85cd72ccc4b175bb2770837a823c09d
186 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 domains, and is flagged as a link farm. The primary URL, 'https://dugedepap.ru/strik?utm_term=are+fedex+offices+open', suggests a lure to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=are+fedex+offices+open PDF link annotation
    • http://help-copyrightservice.xyz/15883595785qa7up.pdfIn PDF document text
    • http://plusstore.pro/polaris_3900_backup_valve_not_workingkc468.pdfIn PDF document text
    • http://beautysss.site/public_speaking_lessons_for_elementary_studentsyt2i2.pdfIn PDF document text
    • http://hihikane.space/54802427206dqvtq.pdfIn PDF document text
    • http://verifedform.com/rozunezokebelowasab8md1.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/3d60663f-d52a-4029-8e0e-c9a32ff77bd4/54784063007.pdfIn PDF document text
    • http://solugivewatewa.myartsonline.com/47840873838.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/nafudedeperemabosuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dbb20e6-e052-4e8f-87f7-24cf6b061dd3/edgar_allan_poes_tales_of_death_and_dementia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe87ec56-9d01-4ce8-a064-19a4a0693de6/big_fish_casino_rigged.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd87b3db-915b-40db-84f9-5c2c35467c84/45239598593.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_d2bc34a587af413eb2269813084c1543.pdf?index=trueIn PDF document text
    • https://504706c9-3a86-45eb-876a-6494ef133fff.filesusr.com/ugd/80c1db_55a2b87339714b239a1436368a34d3c0.pdf?index=trueIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_695a369d6eab4826ac61abda6b8d3cb7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e66c95-d72e-4b66-9a52-83e5ae338b46/40976566632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e71c3ca4-7294-4ef8-995b-0afec42f54dd/96648535691.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb98b8c-de21-4918-adbb-c989da7be203/environmental_health_and_safety_jobs_entry_level_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc318814-d401-435b-8d87-781522d6ddf3/60913607641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fef5f6a3-6dc8-4890-8598-c9614b73a8b9/bases_purinas_que_son.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb8206d-32f6-4894-8be4-500c8691681a/pegebobokarejosojivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8b7960-ca2f-425f-8dd1-8441e8851790/how_to_begin_an_argumentative_essay_examples.pdfIn PDF document text
    • http://fanalejowegop.atwebpages.com/toxixomalelowipid.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_off0000c5b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B4 4964 bytes
SHA-256: 5871ba26b6500631188671c26d68fa8e2c192ef7b65d8fb8cc46007d769f5379
font_01_sfnt_off0000d6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B5 9552 bytes
SHA-256: 442cf91982eda8372d1e5a1d51612f9ebd0acf3017f042a4315d20ed920d0ad4