Malicious PDF — malware analysis report

Static analysis result for SHA-256 896ed327adfa3c0e…

MALICIOUS

PDF

73.1 KB Created: 2021-02-21 00:13:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d5cf7ad38d2f53e4f4a23b14b06ddd93 SHA-1: c44d4d9c969e5960efb0f2d02f7915f317a85dc2 SHA-256: 896ed327adfa3c0e8ff6b0f8dd4127d18fb95c336a2f335092ab55abbeab0556
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to sites that host further malicious content or phishing forms. No scripts were extracted, but the PDF structure itself is designed to host and present these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://jacksth.ru/wix?keyword=farberware+oil+less+fryer+recipes PDF link annotation
    • https://cdn.sqhk.co/joduragenep/d5jdgf1/43629919528.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/18bhWjc/vadisuruzotajanutom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_6015fd54c8f00.pdfIn PDF document text
    • https://serataxufo.weebly.com/uploads/1/3/1/6/131606193/wubazumad_tusisaxazex_koxavalapuloma.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/ijgkgjK/what_does_bucket_list_means.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/GZieLUU/places_that_sell_wings_near_me_open_now.pdfIn PDF document text
    • https://minaraxu.weebly.com/uploads/1/3/4/7/134765114/2224e863a.pdfIn PDF document text
    • https://cdn.sqhk.co/murafabu/HijfgjY/sony_walkman_mp3_player_software_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/jJhihUy/70772319816.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/ziperorifewi.pdfIn PDF document text
    • http://frut-tree.site/92739479691g87w8.pdfIn PDF document text
    • https://cdn.sqhk.co/nepopagugela/jbUdFvs/airport_guy_airport_manager_mod_apk.pdfIn PDF document text
    • http://nonretloli.site/how_to_use_corningware_browning_dishp6ihv.pdfIn PDF document text
    • https://wiguvufa.weebly.com/uploads/1/3/0/7/130775639/zomobowozifipiluwe.pdfIn PDF document text
    • https://nuwofukejixi.weebly.com/uploads/1/3/1/4/131437867/ce949.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://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_off0000d497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 4900 bytes
SHA-256: 81158390840938453f8a79e083072e21f30d52ddd97cd2f9fed6a4aebe80382c
font_01_sfnt_off0000e566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE566 10388 bytes
SHA-256: 7b9e99d0a9aed48506f7915ac4d3666a77a4574a7419d36d6fb9bb442267ebcd
font_02_sfnt_off000108ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EE 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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