Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b0373592eaeb8f…

MALICIOUS

PDF

94.4 KB Created: 2021-03-18 08:17:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8972ca7e5373f98f296744b30baec08c SHA-1: 5e6b4d2478926b6df6ad046ae604bdb61369940e SHA-256: e6b0373592eaeb8fcfccead7f1afe80a858efca4d6419f89f3f23941db71cc5c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://resalured.ru/wix?keyword=minecraft+pe+mods+android+apk PDF link annotation
    • https://kedixomavej.weebly.com/uploads/1/3/4/0/134017366/7259746.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_6029e0395bc90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_60119eacdf68c.pdfIn PDF document text
    • https://pabedimulexi.weebly.com/uploads/1/3/1/6/131606760/bebirog_duxosifebesanu_dujusip.pdfIn PDF document text
    • https://rofofomigedug.weebly.com/uploads/1/3/4/4/134486696/6023608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414152/normal_603d160bd71a2.pdfIn 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/cebb864d-2039-4e06-ba42-76498cebfd58/united_healthcare_credentialing_application.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd862282-6f23-40d7-a26d-27ad0a7f715d/16340533763.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/59373004186.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3822488b-f55a-402f-98af-aad4b93ea79b/future_continuous_tense_exercises_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/sunufi.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/basic_instinct_movie_dual_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/xudumewupira.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/84671132327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582c5525-f95a-4a37-b22e-a5c5e8b04fef/add_2nd_edition_core_rules_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/405d1125-1a2d-4cf3-b70a-cba416ce7c40/2013_highlander_oil_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d2d2816-22f1-4e8c-aa30-56518e7654b7/povakufakuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3cf3859-7dab-46b1-be94-61555abea6a4/45714649638.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/metal_gear_solid_2_sons_of_liberty_vita_controls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c920bc-e1cb-4b33-b8f5-34f6221f8935/duzeweber.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A71 12580 bytes
SHA-256: cf6d1f2e9c194f3b3e4cfb9b316d7a0e6a3869b7e534b23ca01eb19037c5c5a0
font_01_sfnt_off000132c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C4 5336 bytes
SHA-256: 84e1cefcc1b734d687d1fae8de0d3f3f7c2e40af78f4ccd56ec1a690c94878cd
font_02_sfnt_off000144e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144E9 11504 bytes
SHA-256: dc052e9ab2736e3e22e0bc5caa455f886f72f4e0a5d3c68f21549c9ae6960d38

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