Malicious PDF — malware analysis report

Static analysis result for SHA-256 0694e5a40c5d3449…

MALICIOUS

PDF

79.3 KB Created: 2021-03-29 19:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d807d776cbfc68dd685a232329d08e4e SHA-1: 366ace063cf80033d66bff11c601949f427d9239 SHA-256: 0694e5a40c5d34497caa39af08ee6318b97f1883e06486c147afdf485d1d0ac9
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM suggests the document is part of a link farm designed to host numerous links, with one specific external URI pointing to a suspicious domain. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/wix?keyword=pixel+survival+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497344/normal_601b1d672a055.pdfIn PDF document text
    • https://cdn.sqhk.co/jisujesox/fSgehjJ/79908203626.pdfIn PDF document text
    • https://cdn.sqhk.co/fudamewojaf/chdTRij/92721411019.pdfIn PDF document text
    • https://zibozofebar.weebly.com/uploads/1/3/0/7/130740265/redubew_libilapupidov_deduzewofaja_zibofojuduwum.pdfIn PDF document text
    • https://tokemenar.weebly.com/uploads/1/3/4/3/134337898/dowosageme.pdfIn PDF document text
    • https://goradexajegofip.weebly.com/uploads/1/3/0/8/130874122/6541bfb97e6049.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/RghLhiN/new_gospel_songs_2020_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464709/normal_5fdb107b82a5f.pdfIn PDF document text
    • https://sakirirolero.weebly.com/uploads/1/3/1/3/131383462/lifozunigugedir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5fff543268198.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/7a7336a7-a08d-4420-9d5d-034c77646259/directv_h25_100_specs.pdfIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_220b5fa791904e29a5e002b8d449efbc.pdf?index=trueIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_851af5a38a994878bce0cd6c6b03d979.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37c176ed-551c-42cb-9014-cb07cf7c4420/vesiv.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/arpan_movie_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/boise_state_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/chalte_chalte_full_movie_online_free.pdfIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_f30004a136ec4a4989d869ad2060e58f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/android_studio_2._3._3_32_bit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97bc2e17-0332-4a61-98f2-e1bfcd11e8e3/integral_of_sinx2_cos_x4_dx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b15c91a4-ece8-4141-aa00-06536559ab4f/bible_quotes_book_of_matthew.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/xusekuxiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46ee363-b9c4-4afc-8eda-ac1c64066bc1/john_deere_z225_replacement_engine.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_off0000f6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B5 5124 bytes
SHA-256: 284f43705623e00a5b919d8109c28ff3ed63ca9270fe14fad075b2727e6e99bf
font_01_sfnt_off0001083b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083B 11684 bytes
SHA-256: 3c439b8d5dd2e41c2823f993260ddfbfdd76b65eed719772ff9691c456c34781