Malicious PDF — malware analysis report

Static analysis result for SHA-256 264e11cd73b2e380…

MALICIOUS

PDF

79.1 KB Created: 2021-04-03 15:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02e35880a5a785e1768955f9f70a4ec1 SHA-1: d6bbcf5eb1daaa3b6fd47bb79f4cf87fbaf5592b SHA-256: 264e11cd73b2e38002dbb77a631a27fbc61345e0ed968886ef1acd3a3420d803
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://pelibifir.ru/wix?keyword=babies+r+us+6+ply+cloth+diapers PDF link annotation
    • https://cdn.sqhk.co/xibidodoko/hjijaSm/88968392978.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/cAijjiM/85870878515.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/5G5hjTI/41187347685.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/hhjdhid/43068504625.pdfIn PDF document text
    • https://kemavejikokawi.weebly.com/uploads/1/3/2/3/132303077/506359.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/jbjbzgd/air_hockey_games_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/jinavefajevo/jaP3ieA/manerad.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/dgcBCgh/survivor_rope_challenge.pdfIn PDF document text
    • https://lujukote.weebly.com/uploads/1/3/2/7/132712447/tuxipurekenenumatus.pdfIn PDF document text
    • https://cdn.sqhk.co/gegojagakexu/jggc4RS/73462834629.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/07Ljfgh/freelancer_simulator_inc_game_dev_money_clicker_apk.pdfIn PDF document text
    • https://fegowudabe.weebly.com/uploads/1/3/1/4/131438077/kexid.pdfIn PDF document text
    • https://cdn.sqhk.co/kipaselofuza/ija0Gmm/sound_physicians_emergency_medicine.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/bqvicHz/57075637252.pdfIn PDF document text
    • https://cdn.sqhk.co/ganinidunop/YeiajgW/98743319455.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/yghgdih/package_inclusions_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/kutupejotige/2bThe06/52808518740.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/kobivimelelo/super_mario_bros_2_nes_2_player.pdfIn PDF document text
    • https://s3.amazonaws.com/wamatasamegu/97071937180.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_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 5604 bytes
SHA-256: 97b0fb16fcf4e9d45830b8464635bb1efc683179631dd8992e9826ff0bbc5be4
font_01_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 11048 bytes
SHA-256: 3fa90ad52f28ffc534686c1f6a369ff8e77093c2a374c48dc6119135db516fc4

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