Malicious PDF — malware analysis report

Static analysis result for SHA-256 0417df382412bc9c…

MALICIOUS

PDF

86.3 KB Created: 2021-06-03 23:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fe5c4df1d8a73df22cab9014f845f64a SHA-1: e8a424b3d39691052940a6657590a5bfcaaea82d SHA-256: 0417df382412bc9c6198a04aa38bca7283cc58f69c9e57193ff4d6b6d2a78d67
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, suggests a lure related to gaming addons, likely to entice clicks on the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://krisoc.ru/pbw?utm_term=max+dps+wow+addon PDF link annotation
    • https://juladugalevatib.weebly.com/uploads/1/3/4/3/134385664/db4ff8785eaa7.pdfIn PDF document text
    • https://vogitoroxubas.weebly.com/uploads/1/3/0/7/130739894/9610546.pdfIn PDF document text
    • https://kazugimopizefew.weebly.com/uploads/1/3/1/4/131406381/dodovaripifuriwebaru.pdfIn PDF document text
    • https://sixevajerav.weebly.com/uploads/1/3/5/3/135341720/gadutusemuwimoma.pdfIn PDF document text
    • https://xugoxokolo.weebly.com/uploads/1/3/5/3/135392162/5a24e004.pdfIn PDF document text
    • https://bogovimageji.weebly.com/uploads/1/3/4/5/134509337/fudared.pdfIn PDF document text
    • https://wabaxudazisivi.weebly.com/uploads/1/3/3/9/133986682/7cef9d32.pdfIn PDF document text
    • https://parukiwodisurup.weebly.com/uploads/1/3/4/4/134455528/7567108.pdfIn PDF document text
    • https://dosarowit.weebly.com/uploads/1/3/4/3/134315771/5780383.pdfIn PDF document text
    • https://jigadukux.weebly.com/uploads/1/3/4/6/134682377/zuwuxefi-gasojimob-buzutire.pdfIn PDF document text
    • https://tirasuvemesamu.weebly.com/uploads/1/3/4/6/134672388/0692653614d0.pdfIn PDF document text
    • http://maxdps.netIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ad7893b-bd57-43ee-b02b-1fa7d97a0f74/karuna_kontha_malayalam_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9f4bcc-3887-4f11-b956-8f7275c0e185/poronidinogolofomi.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/best_sensitivity_for_pubg_mobile_android_no_recoil_2020.pdfIn PDF document text
    • http://vimadutukad.pbworks.com/f/66616416935.pdfIn PDF document text
    • http://vifogajo.pbworks.com/w/file/fetch/144487614/dynamics_ax_365_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfe22a0-67a2-4279-8c6f-fedad7e8feee/bugojegusebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3892bca6-68a4-4949-9d97-adbcb4ad2bbf/how_do_i_update_my_wd_elements_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30abe7fb-9914-4dc4-8d7a-2d2ff436dbb5/how_do_i_reset_my_vtech_answering_machine.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_off0001160e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1160E 4992 bytes
SHA-256: bef7f2c1a544b6780b8b89168b50eae0bd60dd0aa09bd91ce708feb12c5f8df8
font_01_sfnt_off0001273c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273C 10812 bytes
SHA-256: 92e4e249b173fc2c313a884e074325712c259914343a70a9a780f5880fb112be

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