Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a36802ea6b64982…

MALICIOUS

PDF

80.3 KB Created: 2021-04-04 19:45:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1a9ccaa294d8411823f4acb99d1e0754 SHA-1: c2e95c066006e1cd7811ed547af3c1d9f6ac2017 SHA-256: 9a36802ea6b64982672734d4beeaa4442484b840c61dcaa7d9628662051944e7
186 Risk Score

Malware Insights

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

The PDF document contains a mass of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM indicate this behavior, and the ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to fishing reports.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=lake+ray+roberts+tx+fishing+report PDF link annotation
    • https://jepopiravu.weebly.com/uploads/1/3/4/1/134131497/3338842.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/mosorejepap_mamavulusamufub_xujasodadikutu.pdfIn PDF document text
    • http://kifisafobubupo.mygamesonline.org/logical_framework_example.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/77020673525.pdfIn PDF document text
    • http://palopej.sportsontheweb.net/totowotomatuzid.pdfIn PDF document text
    • https://nizakibete.weebly.com/uploads/1/3/4/3/134386075/3286669.pdfIn PDF document text
    • http://wunuvuzixuxi.getenjoyment.net/89254669429.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kapirexazi.onlinewebshop.net/sodastream_source_element_big_w.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_c4605b4d4a2a4961a8e5d0545f5f2e7b.pdf?index=trueIn PDF document text
    • https://99442e0c-e188-470f-b1e9-a2082f9e7f28.filesusr.com/ugd/2274a7_be957da4e6cf47f6be91ae2c203e1590.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/what_is_the_best_online_first_aid_course.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/17585549857.pdfIn PDF document text
    • https://2b01876c-5741-4e94-bfb6-30973e4a6517.filesusr.com/ugd/45d688_efacbd7575954df3b6093fd5e2bd2391.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/dhs_child_care_licensing_forms.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/suxokirapanipuveto.pdfIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_c720a40c81c445e1b6a0d90643c21fee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/spell_bee_words_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/46370147863.pdfIn PDF document text
    • https://041aa876-b65b-432c-96c0-58c8b295a4e4.filesusr.com/ugd/90d19e_defbd4f1aae345a880b12577bbe684fc.pdf?index=trueIn PDF document text
    • https://c7f0abc7-d23b-482d-bd16-0771495bb668.filesusr.com/ugd/bb13a2_7406a4a164714bb7a47c35a67c873768.pdf?index=trueIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_1b93a7982df84eb59318475139fbfdc2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/is_fox_nation_available_on_dish.pdfIn PDF document text
    • https://651f5d5e-5f42-4fb0-8380-889764ca350f.filesusr.com/ugd/b2f7c1_1d8cfc1d3bdb4f878170ea28d2483c51.pdf?index=trueIn PDF document text
    • https://f2d828cf-06d9-46ea-85af-d88b0bc20d44.filesusr.com/ugd/501a20_506dd2198f664676bd3951f2e56f0400.pdf?index=trueIn 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_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 5444 bytes
SHA-256: 723cf3f1508f0aad25cd41d22e0e673ad45aa0c38634e558a36a024c8aadd020
font_01_sfnt_off00010dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC4 10560 bytes
SHA-256: ddd20ed69dee12cb80e02024f3bee6cf315677bbd99cdd02c040625a97c440a0

Open this report in the interactive analyzer, or submit your own file for analysis.