Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e546db18fc0f812…

MALICIOUS

PDF

132.3 KB Created: 2021-02-06 23:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c90a67c3a4ef731364434daecae3113a SHA-1: 9117d38a0ef5e491d4749496aad07699e82cb7cc SHA-256: 7e546db18fc0f812be63ae536715c7dbc120389c5cca0c3e24a544322ac765a9
196 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. The 'SE_REMOTE_SUPPORT_LURE' heuristic indicates the document likely instructs the user to install or connect with a remote support tool, a common tactic for social engineering attacks. While no scripts were explicitly extracted, the PDF structure and numerous URLs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://druttle.ru/wb?keyword=princess%20connect%20re%20dive%20anime PDF link annotation
    • http://pusaburuku.22web.org/96099160059.pdfIn PDF document text
    • https://supimoxu.weebly.com/uploads/1/3/5/3/135319300/riseladonupukozesoju.pdfIn PDF document text
    • http://kyhni.site/kuxetutetupnxd8.pdfIn PDF document text
    • https://wanesutilujat.weebly.com/uploads/1/3/4/8/134868149/befake_madumi_zobekuba_tupunedizogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pojitak.epizy.com/cavernous_malformation_brain_stem_surgery.pdfIn PDF document text
    • http://pakafadudu.epizy.com/financial_reporting_companies_in_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/gardens_of_the_moon_parents_guide.pdfIn PDF document text
    • http://vuriruzuminomu.epizy.com/lulevaruwijevuk.pdfIn PDF document text
    • http://vigevelo.rf.gd/casio_fx_991_es_plus_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/76126299736.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/dream_girl_full_movie_mp4_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/wunuvudamedogimurorezil.pdfIn PDF document text
    • http://pakekaririwofas.rf.gd/deadline_crime_with_tamron_hall_episode_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/sample_special_education_lesson_plan_templates.pdfIn PDF document text
    • http://fipegaz.epizy.com/specialized_roubaix_bottom_bracket_cable_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wovedukevikov/animals_song_by_martin_garrix.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0001d8f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1D8F9 23844 bytes
SHA-256: 89c41e9bc08acf85510a2e2b85d215ffd646532fe72f133daf399687444afa47
font_00_sfnt_off00012b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B29 37132 bytes
SHA-256: 4b5474d0fe379d3673ce33db7215405d035fd9f99e161fc6a6f2b8ed4b6bc715
font_01_sfnt_off00019e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19E7A 5112 bytes
SHA-256: a767098f0c0b547e7a9fea1442fffafc64c53e6c984eead9c5d8fd8c2b0e7283
font_02_sfnt_off0001afcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFCF 12548 bytes
SHA-256: 78b231f00659883becfc4a5bf7e32af6d4a3523caafa230045026ed3430e303d

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