Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ea3236b4ad3c85…

MALICIOUS

PDF

77.0 KB Created: 2021-05-17 12:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7671bb4a73458e66df0c9d00e636af52 SHA-1: 87022bf20c2fd9e2f90508057fbb424d5c6031fc SHA-256: d5ea3236b4ad3c85e6842fa3064bd11234ae71d7a7dcd1970048aaeb76c1da23
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/strik?utm_term=snow+white+evil+queen+poison+apple PDF link annotation
    • https://cdn.sqhk.co/butituguxur/gigiJid/39391209650.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/C9Ohigd/72191408783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493917/normal_6059b09cf00d8.pdfIn PDF document text
    • http://strapslap.online/juraxiwugotj1adw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_5fdc68f8ac8cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477400/normal_5ffcc42783951.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/cNM0CHH/when_was_the_first_induction_electric_motor_invented.pdfIn PDF document text
    • http://reawolt.online/la_vie_en_rose_full_movienvv3l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403534/normal_6065f62cd4748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412767/normal_601bbd5207407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://156bb51f-0b62-477f-88ca-8620af00812b.filesusr.com/ugd/e3ff21_85c59a7466994df591e33c17c05d8d70.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae6259cc-1a5a-47b4-abf6-42ae7be8d36d/mezobasaraporifegakerifom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/644bb4b2-6fca-45a8-8c71-27f674388f99/world_poker_tour_2020_live.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_92cb2bc65e45431ea4fa9cddc2b27253.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec3f1a84-675b-4bfb-b1d6-a73b919f8dcf/354764521.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/lightroom_mobile_tutorial_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6960d891-ebb1-45c9-adc6-262f234dd0ac/what_is_a_onyx.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/assoluto_racing_mod_apk_1._13._6.pdfIn PDF document text
    • https://ec560393-4650-4708-bf0c-d08fceb8458c.filesusr.com/ugd/ca69db_79579f05221d468da82051436939cf4c.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 5192 bytes
SHA-256: 18902f145e0957eb77981f22e6e94b1f5e3fd625961071e775177843744e17cb
font_01_sfnt_off0000ea50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA50 11276 bytes
SHA-256: 020f56047260f78c870c65f09aa97c128e1ce9115cf2b8855a7d0e91908cf88b
font_02_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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