Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58a3da73c17afe7…

MALICIOUS

PDF

69.1 KB Created: 2021-02-16 20:36:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 470144d2a888796e5a306c993050c2e0 SHA-1: 94b6d1a677e867d930fc6eb7abb8deaacd09cbff SHA-256: c58a3da73c17afe76e6fda375a622bcb52b639b14bbd591f92b99c2d99466d0e
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to a 'student manual', likely a lure to entice users to click on the 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://seumenha.ru/wix?keyword=lds+student+manual+pearl+of+great+price PDF link annotation
    • http://kuwofadenokul.iblogger.org/gerewu.pdfIn PDF document text
    • http://visiblawty.com/vekefodegezuwewiirs5y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_6022af3c90329.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501804/normal_5fcc2fd55c251.pdfIn PDF document text
    • https://cdn.sqhk.co/gubisagebuto/hdL3OjL/kifufezosoruk.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/3ij8hbK/swepco_outages_in_my_area.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/h3Zid4W/sesawikazuromopolofug.pdfIn PDF document text
    • http://letgtma.bid/dj_music_mixer_studio_apk_downloadfh3vo.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/jeUhPig/66638337188.pdfIn PDF document text
    • http://cg-designer.xyz/zoosk_apk_crackj4gfj.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/dghXic9/vice_president_debate_2020_transcript.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475382/normal_600663595e5ba.pdfIn PDF document text
    • https://cdn.sqhk.co/dutimapo/iahjmgh/free_printable_christmas_bingo_cards_1-_75.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavofedelozus.rf.gd/13509622894.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/67302569627.pdfIn PDF document text
    • http://tisuvelepep.rf.gd/catalasa_fundamento.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/takaxudirumumamunufo.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/kegojirurigikiwa.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/35969047360.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_off0000d2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AA 5416 bytes
SHA-256: 1d876915d0b221c02d4c694d77141bfac02338c642479e52767649070a520803
font_01_sfnt_off0000e503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE503 9900 bytes
SHA-256: 85cc6aafeee08a65d373b7ca342a54cd33613d520aff61f548a7e1271446f937

Open this report in the interactive analyzer, or submit your own file for analysis.