Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aef03430a412232…

MALICIOUS

PDF

59.1 KB Created: 2020-12-19 02:14:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e88d0a4691988a9947b28a3738774b00 SHA-1: 9836098270209e65f3f1a1e516a036b8d52b57d9 SHA-256: 6aef03430a412232b241e007fa6faf84a2cd605fe099cbb1c2489980201f462f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, including a suspicious one pointing to 'traffnew.ru'. The document body, though heavily obfuscated, suggests a lure related to 'Tot tutors toy organizer canada', likely a pretext to drive traffic to the linked sites. No scripts were extracted, but the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

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://traffnew.ru/strik?utm_term=tot+tutors+toy+organizer+canada PDF link annotation
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/48aef530062169.pdfIn PDF document text
    • https://lufokozu.weebly.com/uploads/1/3/4/7/134755413/ecd181.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/cafaf473.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/jivavijepepanemegag.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/batekilodebeg_vawobiripate_wubunuvaro_jujaxi.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/34642.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/d0241239-d38b-4587-9101-a784f850d57e/31070317420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71173120-6361-44e2-b671-8cb51d9b749c/journal_entry_lord_of_the_flies.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/quantitative_seismic_interpretation_avseth.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bdee8c9e503d27a507e8/t/5fd6d7f0d654060362da0e44/1607915505174/ibm_serverguide_x3650_m4_windows_2008_r2.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/jigepogiwedugitijewes.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_off0000acc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACC2 5176 bytes
SHA-256: 972153974adcb3fa0c1ddad0bf835b2e67efde0259a8e84e8e5080b18a2266d5
font_01_sfnt_off0000be7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7B 9912 bytes
SHA-256: abc431bef7b6cdb5d83da02022b909dd37727c14603c7cc19b3c9dee5e3c1644

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