Malicious PDF — malware analysis report

Static analysis result for SHA-256 285f9befe1d4cbfc…

MALICIOUS

PDF

75.3 KB Created: 2020-12-31 05:56:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 77e33041a2db7bafe042bbf3c772a658 SHA-1: 9c5083d114a3d2de62f95310737f3841e200b172 SHA-256: 285f9befe1d4cbfc70098d0bdd39074c92261402d370201cc65a66c91b05d285
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or malware distribution attempt. It contains numerous external links, including a suspicious URL that appears to be part of a link farm designed to drive traffic to other sites. The document body, though heavily obfuscated, suggests a lure related to free software, likely to trick users into visiting these malicious sites.

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 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.
  • 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://traffset.ru/strik?utm_term=my+boy+free+emulator+iphone PDF link annotation
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/zedujux.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/25796.pdfIn PDF document text
    • https://regifevadep.weebly.com/uploads/1/3/4/4/134476302/2308038.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/21a16a72.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/ruwez.pdfIn PDF document text
    • https://demavagof.weebly.com/uploads/1/3/4/0/134017100/3958728.pdfIn PDF document text
    • https://xonarupitowij.weebly.com/uploads/1/3/4/6/134617661/votesepefexixon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/10459616327.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/bypass_mega_limit_without_vpn.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/call_ringing_sound_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gopifu/expanding_single_brackets_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/us_army_helicopter_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/charkha_mera_rangla_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/abcd_movie_video_3gp.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96C 5208 bytes
SHA-256: af97f5d6b85717848df462cb721a1c8d38f4f15b54528ddcf7ab141120eeecbc
font_01_sfnt_off0000fb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 11068 bytes
SHA-256: a44e35cf3256dc7c8f013673abf2c4ea3916a0a806ecb3ca97b853d1e3d10028

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