Malicious PDF — malware analysis report

Static analysis result for SHA-256 9968b4377fca00c8…

MALICIOUS

PDF

73.0 KB Created: 2021-06-05 22:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3825e865913b604ae4cdd43858447ff0 SHA-1: 98dd461d452b4cf16eeea015079267831638cd60 SHA-256: 9968b4377fca00c884e939b49bbde90d3daccaf8ace5ce4c01c2b100acddc72c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic identifying it as a PDF SEO link farm. One of the primary external URLs, 'https://allytemp.ru/pbw?utm_term=sembaruthi+poove+sembaruthi+poove+ullam+alli+mp3+song+masstamilan', is flagged as unknown reputation and is likely the intended destination for malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://allytemp.ru/pbw?utm_term=sembaruthi+poove+sembaruthi+poove+ullam+alli+mp3+song+masstamilan PDF link annotation
    • https://muvitaburire.weebly.com/uploads/1/3/4/4/134441723/tewolexipuzonuziza.pdfIn PDF document text
    • https://roluwisotem.weebly.com/uploads/1/3/4/3/134368144/serotesevazulef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424935/normal_5fe0bbfdda0ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502248/normal_5ffc0dd7d8424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408177/normal_5fde4ddd7f216.pdfIn PDF document text
    • https://waliruwixogipi.weebly.com/uploads/1/3/4/0/134016871/91130d78e.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/abc61282-9374-4cf9-82f1-d82bcf3aa0b3/46114954519.pdfIn PDF document text
    • http://visetululiv.pbworks.com/w/file/fetch/144416160/73574146546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939a599e-3201-4445-a0d5-783bafb4fedc/local_pressure_washer_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a66be10-c65d-4b08-be26-0e6577053685/bushnell_telescope_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eafa1e01-c276-490b-9461-566c3b4ae6f7/how_long_to_cook_a_10_pound_turkey_in_a_roaster.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94bf7cd0-2ffb-4463-8108-73739cf7921e/150_pcf_to_kn_m3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d574343c-7cf2-434a-a058-e0a149072059/tukuzorubomatof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a342bc44-f50b-46cd-8cee-7ef122196719/revelena.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144617019/comparative_and_superlative_exercises_with_answers.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_off0000cfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC5 5584 bytes
SHA-256: 80ff58e838636a679632317902aa39031ac611f39de5f462cf9be4b01728490b
font_01_sfnt_off0000e294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE294 10980 bytes
SHA-256: 799429050c9715a4278e821b8b1ddcb8a41e9cf5aa4f184b1aabf3dc58ca065f
font_02_sfnt_off000107ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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