Malicious PDF — malware analysis report

Static analysis result for SHA-256 330324b5b70138d6…

MALICIOUS

PDF

70.9 KB Created: 2020-11-24 20:46:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0f46973995353e9383fb0d3e7e06ed2e SHA-1: b39ded2c0f132ac7dabf54e7a033fde5919f4ca5 SHA-256: 330324b5b70138d64e3db6c7d74ba7e9ffcb896a718e287981556474e3123446
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to link farms, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. The primary malicious URL identified is traffnew.ru, which is likely used to host a phishing page or download further malware. No scripts were extracted, but the PDF structure itself is designed to redirect users to malicious content.

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://traffnew.ru/123?utm_term=ems+drug+quiz PDF link annotation
    • https://jupovibofekek.weebly.com/uploads/1/3/4/4/134490290/9098473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_5faeee2166e7a.pdfIn PDF document text
    • https://navubenawegef.weebly.com/uploads/1/3/4/3/134320789/5682605.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/misatevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391001/normal_5f9061b261bf0.pdfIn PDF document text
    • https://tivurenufetoza.weebly.com/uploads/1/3/4/2/134235987/fekolulixapuniz_nowozizigurita.pdfIn PDF document text
    • https://zowimebewira.weebly.com/uploads/1/3/1/6/131606727/d554053a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f97ddfdb7a5e.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/vazasagitute-rojanavivevaj-vazil.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/fc6dd568-3589-4017-9f52-f489081c6145/vufis.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/65451341895.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/fiwesujigu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/haloalkanes_and_haloarenes_notes_download.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/math_worksheets_for_8th_grade_multiplication.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dad06fa-c35f-4dca-9155-0dc825ea249e/10_minute_table_runner_with_batting.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_off0000ccd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD8 4504 bytes
SHA-256: 3999b9a1248b1c8a7f9c1a2389dc8cc1573da306aa35ea66c2ed5df38cbb8954
font_01_sfnt_off0000dc02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC02 10848 bytes
SHA-256: dd7680b4fdc3e3fa250056cc3ba3800f605fd059dce8594cf5f6fb99e0046ca1
font_02_sfnt_off000100ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EC 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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