Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e845cbcf0d8547e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-31 14:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 62ba209fc8e46b0eb14e0ad51f9086a5 SHA-1: 8dbb46e276c80af92f0028b02dc5a38881c2ecb3 SHA-256: 7e845cbcf0d8547e4136ca69c4995a994739ab66c679e2adac861515eaa85675
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The document body, though heavily obfuscated, appears to contain keywords related to a game, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://druttle.ru/wix?keyword=how+to+get+to+cinnabar+island+pokemon+planet PDF link annotation
    • http://mofobawosenej.mygamesonline.org/employee_letter_of_recommendation.pdfIn PDF document text
    • https://cdn.sqhk.co/lixabanitav/fhghVge/fodomabewubupuwasi.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuguxovim/CTjhLrp/secret_of_mana_switch_multiplayer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d74058ad-8c31-4576-aeb4-582a73b10e1e.filesusr.com/ugd/666c83_576e58e312584aaca934137b62ead31e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/50cc_scooter_repair_kit.pdfIn PDF document text
    • https://e4dd5bf8-bd13-43e3-b37b-9624b2564f03.filesusr.com/ugd/093416_fb54c7bc341b478f93fd130c0942c24f.pdf?index=trueIn PDF document text
    • https://9462281c-6212-45c1-8f90-c4e3c363a226.filesusr.com/ugd/007d40_1742f621ffee4398be30119313b4d555.pdf?index=trueIn PDF document text
    • http://josuxak.atwebpages.com/39906653702.pdfIn PDF document text
    • http://mopajob.rf.gd/29139393942.pdfIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_cedd0eefe04f4f958ccf1a5b28c26c7d.pdf?index=trueIn PDF document text
    • https://6c403777-3bdb-430d-a4ca-23d5788374d5.filesusr.com/ugd/e0034b_afffc295ae804086aa85ae6c6ddac6cc.pdf?index=trueIn PDF document text
    • http://magivaxinel.rf.gd/jurotisiwiwut.pdfIn PDF document text
    • https://71b4061d-0fbe-47a8-a671-08758978b022.filesusr.com/ugd/0216f2_3377d5fc64224d0c8505f950e4f3c603.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gezetega/hypercapnic_respiratory_failure_guidelines.pdfIn PDF document text
    • https://54957a25-093b-4cbd-a4f0-8eb5fea931f0.filesusr.com/ugd/8ba634_e6c83c113c0c4e6b96ec28eb9b3c5f44.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_8bfe1426c51e4917b11174a12249af73.pdf?index=trueIn PDF document text
    • https://eadb47d6-6712-4ecd-aa5a-2cdcf2d90b86.filesusr.com/ugd/c844bf_ed112d26fde747deab9f4ec3d8a0afaa.pdf?index=trueIn PDF document text
    • http://dopisudul.epizy.com/consumer_reports_subscription_cost.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_off0000e822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE822 5652 bytes
SHA-256: aa35a147a5578124065df29ec7927aedf50ed8b2b1b709ad839169b44c45245d
font_01_sfnt_off0000fb53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB53 10452 bytes
SHA-256: c1ffe83f16c6327782d7f777027b3f91ac54ecba4aec71c90bfd22b379a065cd

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