Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ac46c27d4375d86…

MALICIOUS

PDF

80.7 KB Created: 2021-02-16 11:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 1775dc123b0b553e7ef7751b6f15a781 SHA-1: b8611247c9b785342c404f58ca01917a9f3ea5e7 SHA-256: 3ac46c27d4375d86e648cecc81e7ffb6f0fa9c008317bf562377f5e4183079bc
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a likely attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://leonvi.ru/strik?utm_term=how+to+use+presto+cool+daddy+deep+fryer PDF link annotation
    • https://cdn.sqhk.co/gadujotev/3ghbz8w/tedisesoponox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449974/normal_5fe20d62178e9.pdfIn PDF document text
    • https://sodapovi.weebly.com/uploads/1/3/4/4/134494820/wanamir_pagapifirenuw_nivonunagiroxet.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/vSTHgdb/lizujaxawumusunijubereg.pdfIn PDF document text
    • https://sorozodosunew.weebly.com/uploads/1/3/1/3/131381031/6774822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413118/normal_5fc9447626eb2.pdfIn PDF document text
    • http://xezuviwejugume.22web.org/navy_support_facility_diego_garcia_base_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417817/normal_600ddebeaec0c.pdfIn PDF document text
    • https://cdn.sqhk.co/navotezive/bii1Agc/fajazefefodotapasarowa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460247/normal_600d6d79cae83.pdfIn PDF document text
    • https://cdn.sqhk.co/zamokaxu/eS3b6hi/vazebinujimufap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486521/normal_5fd33f039226d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491945/normal_6011fbd1c8ce5.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/YheWjea/attack_on_titan_2048x1152.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
    • http://xiwaresijo.epizy.com/microsoft_flowchart_template.pdfIn PDF document text
    • http://borogibapomad.epizy.com/jutumowuwasiti.pdfIn PDF document text
    • http://wevevaviz.epizy.com/19423749698.pdfIn PDF document text
    • http://pifamodaz.rf.gd/fall_leaf_pattern_template.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_off0000f176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF176 5032 bytes
SHA-256: 24f0e4a6c6d95f778ed7c887bc7c5b5f894d008ac08f7409138cef0ad4f01807
font_01_sfnt_off000102cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CC 10788 bytes
SHA-256: e8b27a828f9530105c9c58d1a76b99fe4bb14fc3303f0a456380fe55e6b596e1
font_02_sfnt_off0001276f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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