Malicious PDF — malware analysis report

Static analysis result for SHA-256 d694b916a8956599…

MALICIOUS

PDF

75.5 KB Created: 2021-06-10 19:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ee413e99f3e1ed920b5f157a0c3afddb SHA-1: 59e1a119cc8d24e92428698d7fbf3a53d19d90ac SHA-256: d694b916a8956599143e2d3623e9230999ebecf731c2e68cb0a02de6730a48b2
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The document body's obfuscated content and the presence of numerous URLs support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://smidgel.ru/pbw?utm_term=gta+5+ppsspp+files PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372384/normal_60418c99d3710.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5fc8269235f1d.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4403674/normal_60afe6c5b7db9.pdfIn PDF document text
    • https://duvugatezema.weebly.com/uploads/1/3/4/6/134650783/xodasevepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412897/normal_6066b53c425d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480753/normal_5fd97390103a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_600d2d00b871e.pdfIn PDF document text
    • https://matasomorat.weebly.com/uploads/1/3/4/4/134492922/d699ff08a80426d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463272/normal_60c0cab270ba3.pdfIn PDF document text
    • https://pagomowe.weebly.com/uploads/1/3/4/6/134608852/gatubukuladola_nirumeferobapan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fdb8c7a54230.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/84e547e5-4d36-41e0-9f85-505892875720/gokamira.pdfIn PDF document text
    • http://sorawako.pbworks.com/w/file/fetch/144462351/vosuxafaxumiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd073957-09f1-4c8d-8850-c4ea091c40f2/11325713221.pdfIn PDF document text
    • http://fokojifidesi.pbworks.com/f/zusarigigapunaxowiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3594f77-8ab6-4b42-8e7c-070a2832df5c/graco_pack_n_play_on_the_go_instructions.pdfIn PDF document text
    • http://gisugakeg.pbworks.com/f/lightroom_software_for_pc_free_download_with_crack_32_bit_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65e3b11-1321-4861-8775-8d81c0afc00d/statistical_methods_in_psychology_online_course_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f204c8e-7941-4781-9a1e-f3c97422cf44/resignation_letter_format_for_mechanical_engineer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c48ad79d-bf65-46ed-8db1-02ac2a803c1f/homemade_target_shooting_stand.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_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 4956 bytes
SHA-256: 1dd39332c5dd16531872e3088b63b8a10eeb27aaac7ba0560567380379cf88a2
font_01_sfnt_off0000fafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFB 10744 bytes
SHA-256: 86d7c82e44d2f3144f40865eae1f6ca845ab062632061f19cea38826ebc5c4d8