Malicious PDF — malware analysis report

Static analysis result for SHA-256 8875a5da3f96672e…

MALICIOUS

PDF

86.3 KB Created: 2021-03-21 04:28:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: cd6a02cce031f4c125352c96ccce059d SHA-1: 522c5b83f7c99f5d5d66e44db2faba007eaaef65 SHA-256: 8875a5da3f96672eda0bd4dccd5958f94754cb114ab3ee54fdd70747f6f70991
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://baarspo.ru/wix?keyword=ucf+registration+dates+fall+2020 PDF link annotation
    • http://wuramegojuluz.mywebcommunity.org/wafulidosowanejususelevug.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/virginia_woolf_to_the_lighthouse.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/dhcarsD/road_trip_movie_ost.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/c0gjgjX/71085608051.pdfIn PDF document text
    • https://cdn.sqhk.co/kewebogi/QPyuvhe/do_uber_drivers_support_prop_22.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/jdjiAia/skin_care_products_for_newborn_baby.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/heYhaji/64247579453.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/idxgdft/stickman_police_counter_city_gangster_2.pdfIn PDF document text
    • http://tokemiji.22web.org/61952217840.pdfIn PDF document text
    • https://cdn.sqhk.co/xaselavub/aiihbgd/29243330078.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zegiwewezenaro.myartsonline.com/nijokek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0d1bb5-cec0-496e-ae62-6756e03096ad/6316838685.pdfIn PDF document text
    • http://xebiramipi.epizy.com/13951672628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b10d53-1433-46b7-9310-d2b2100b4c71/chinese_cinderella_book_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a44700-edb1-4f10-8f64-ddbdda3aff1d/musical_note_crossword_clue_5_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc2bd5d4-5545-4936-b27c-14dda960ab83/how_much_does_data_scientist_earn.pdfIn PDF document text
    • http://ponenasese.epizy.com/cbse_guidelines_for_school_canteen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04e2044-b3d3-4df2-ac2d-92773dfc26c3/zavewegaxagipez.pdfIn PDF document text
    • http://ramapenutizawa.epizy.com/digital_marketing_upwork_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fa599a7-a9f2-4892-a30a-7dfaa20eed4c/fire_in_the_hole_short_story_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27de7f88-6e6a-4760-bdba-36c1655a9879/27236476240.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_off00010543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 5244 bytes
SHA-256: 51a099e8fb842f06a6477d1f5be3ad8b0948e63b1bc30e8a24a14192e6e7f9e4
font_01_sfnt_off00011719.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11719 11348 bytes
SHA-256: 30bb501dbccbfc122bd70c2cdb0c79453143868f7e86ac44a5612a6806ec6a70
font_02_sfnt_off00013dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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