Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f1e0176b9d39a4…

MALICIOUS

PDF

89.1 KB Created: 2021-06-13 15:01:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1b2d97bedb0994bcd4b5934f9a675603 SHA-1: 04321b4796afb30e7801984e4167fe23716ab675 SHA-256: 01f1e0176b9d39a4878c58823cffededd3f20048e49078974bc10dacb0e4c96f
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 detected 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 one pointing to `laborke.ru`, which is likely part of a phishing or malware distribution scheme. The document body, though partially obfuscated, suggests a lure related to song lyrics, further supporting a social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/pbw?utm_term=download+lagu+ride+twenty+one+pilots+lyrics PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423780/normal_606da0d626f4d.pdfIn PDF document text
    • https://zorikibezoxima.weebly.com/uploads/1/3/1/3/131384208/7879563.pdfIn PDF document text
    • https://mevinabepoke.weebly.com/uploads/1/3/2/7/132740553/9291348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_5fd203151e079.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413238/normal_5fecc25d04f27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470521/normal_604a601af3bf2.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/383f47a8-f68a-4362-9426-cecc8da791d1/gilakikam.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/short_professional_bio_examples_finance.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/52819130506.pdfIn PDF document text
    • http://zeratuwolima.pbworks.com/f/82248388494.pdfIn PDF document text
    • http://wusagem.pbworks.com/f/netojopisuxuzesojij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/391659ec-bb3f-447e-93f2-471d6e96106c/gorilla_my_love_short_story.pdfIn PDF document text
    • http://sikovifif.pbworks.com/f/bs_shah_maths_free_download.pdfIn PDF document text
    • http://dawanitapix.pbworks.com/w/file/fetch/144954453/rekaxukebirerojeke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2810a4-bcd5-4d5b-ac13-4d08779bd925/citizen_eco_drive_watches_cheap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e5918aa-4791-4b49-84b3-0806a2cb5622/batijejewajewemugajopafo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff6e475e-2a80-4b33-92b3-b85c88b5d2fa/2306454423.pdfIn PDF document text
    • http://supijexed.pbworks.com/w/file/fetch/144779694/turumowivanekima.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/f/group_a_gazetted_officer_for_aadhar_card_list.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_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 5436 bytes
SHA-256: d3d8a0509bf7fa14ad73368c787b0eac7ea5bc09d3dbed3777ab5800d357bfa0
font_01_sfnt_off00012ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 13980 bytes
SHA-256: 44eca53aaa8cd99242a97668acb51d2d082124865e33483d02b1e1970015d1d4

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