Malicious PDF — malware analysis report

Static analysis result for SHA-256 447765fa7c8fa310…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 05:04:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9180c6f0eb727a0ce46eb40f78515a44 SHA-1: 211c50c2b11e01b81a043d38fa82f1c49fc2cc89 SHA-256: 447765fa7c8fa31010edbb97f896e7a20ebb5246e6a232820be41c64352d453b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/wix?keyword=vip+loan+shop+address
    • http://gooddevice-online.com/2636928057xxxj3.pdf
    • https://dugaxopi.weebly.com/uploads/1/3/5/3/135305828/kinote.pdf
    • http://liwadaxezaf.getenjoyment.net/66799665221.pdf
    • https://cdn-cms.f-static.net/uploads/4375698/normal_6055f88c34f94.pdf
    • https://cdn-cms.f-static.net/uploads/4392656/normal_605fd8cd69a95.pdf
    • http://circulyarkadigital.xyz/2005_honda_odyssey_catalytic_converter_locationx7vgs.pdf
    • https://jetezoxow.weebly.com/uploads/1/3/1/3/131379231/7144047.pdf
    • https://luvodufugatese.weebly.com/uploads/1/3/4/8/134893210/vepudugi_poniz_pilonalu_wepozodi.pdf
    • https://static.s123-cdn-static.com/uploads/4373516/normal_5fdff7c204cdd.pdf
    • https://lerojapozexux.weebly.com/uploads/1/3/4/0/134016693/1f4bfe39f8.pdf
    • http://findattime.com/52726272730oc75d.pdf
    • http://rm-swis-mine.com/how_do_i_change_my_roomba_batteryaknda.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leributafa/angular_5_file_from_s3.pdf
    • https://s3.amazonaws.com/tozaduliwubega/osciloscopio_bk_precision_2120b_manual.pdf
    • https://s3.amazonaws.com/mukut/tesajibafipivokotimoxon.pdf
    • https://s3.amazonaws.com/kofabube/marvel_comics_book_free.pdf
    • http://tirisesu.onlinewebshop.net/abrsm_grade_5_theory_book_answers.pdf
    • http://wejufutaz.onlinewebshop.net/zoom_h1n_vs_tascam_dr-07x.pdf
    • https://s3.amazonaws.com/sizabo/icsee_user_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb1d.bin
a72809b9ab2d7f3b5771cb7e9295d52b12b192e0a6bc313a9cd5d9d15fe0cdac
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1D 5012 bytes
font_01_sfnt_off0000fc1c.bin
c3d30ecba571e9eb75e2a67f599ddd4e55b750bd64e186c755e3de564e2197aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1C 10980 bytes