Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f6ac424d82d96bd…

MALICIOUS

PDF

77.4 KB Created: 2021-03-22 11:18:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ddee960e26cdc8bd8d95e4a4ee1f96e8 SHA-1: bfe96fc7f50cc2ba8ac191e8da344b9c166e8510 SHA-256: 4f6ac424d82d96bd75b80be3f192bf21fa483fe108181988d448305b9aacf4b4
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with keyword-based redirection, likely to facilitate phishing or malware distribution. The document body, though heavily obfuscated, contains keywords that suggest a lure related to popular online services like Hotmail and Facebook.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://druttle.ru/wix?keyword=hotmail.+com+facebook+login PDF link annotation
    • http://justiciaforjustice.com/78420775057t23gz.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/ehjjdjj/hoverboard_racing_game_ps2.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/XOmifhh/tidivoxenup.pdfIn PDF document text
    • http://shopee24.site/wufejivepin9jnv2.pdfIn PDF document text
    • http://photoforce.ru/disewadujixezuvazipewr19ju.pdfIn PDF document text
    • http://tlgfree.xyz/ars_notoria_espaol_descargar81wb9.pdfIn PDF document text
    • http://brumbum3.xyz/emotional_blackmail_meaning_definitionqexcz.pdfIn PDF document text
    • http://superheatbelt.xyz/55999578318j3xap.pdfIn PDF document text
    • http://afracheat3.xyz/mekeresogovuxae9q3l.pdfIn PDF document text
    • http://tryraisins.club/chalkboard_template_powerpoint_freep1570.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vewomani.rf.gd/vulixiwivukazedejeta.pdfIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_126979e5279d4855b592459b0904a284.pdf?index=trueIn PDF document text
    • http://xapimiwosusuv.epizy.com/cavalry_charge_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/rimuzovikufupuwobazo.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/george_foreman_indoor_and_outdoor_grill_22460_review.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/lowimipodazapamanel.pdfIn PDF document text
    • http://xubexiv.epizy.com/pl_sql_string_concatenation_single_quote.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/64595217538.pdfIn PDF document text
    • https://4ad55601-b8ab-4ae0-bc0e-e90069072326.filesusr.com/ugd/3aca14_4f5e39407c66418590e89abed85647b3.pdf?index=trueIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_4e5dc0071d2d44d7a7d6aabb512fc4b2.pdf?index=trueIn PDF document text
    • http://vowefaxi.epizy.com/90241798320.pdfIn PDF document text
    • http://siroluga.epizy.com/89497283759.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/43804093463.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_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 5124 bytes
SHA-256: 2735afd33d528a8ca759f07635ae1a1151b5ca78a5998b9efe2e248c6b89de04
font_01_sfnt_off000101ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CA 11124 bytes
SHA-256: 5eda1390b0377b04bdbc8d5ff2b3659f34c47241b36258ec2f8997a776775a20

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