Malicious PDF — malware analysis report

Static analysis result for SHA-256 a99af42f719e93c9…

MALICIOUS

PDF

78.3 KB Created: 2021-03-29 17:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 224fef5e4a933b51ff20584c5e3522ad SHA-1: e8b4d7737945dbf591f1b2d80fb5921ecec47dcb SHA-256: a99af42f719e93c9e6a65c36c662a1da367a23f3df4b92fd55b139b8832029b6
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 0.9992

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://mezovuduw.ru/wix?keyword=if+i+stay+book+2+read+online PDF link annotation
    • https://cdn.sqhk.co/dogutadova/jgec3ih/40690557702.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/ijYjajf/classroom_management_plan_middle_school_example.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490123/normal_601bb17f386ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453108/normal_603062c4932ba.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/8hhhfSY/90669074589.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_603574d0d9c6e.pdfIn PDF document text
    • http://rekubojuxow.22web.org/bengali_movie_awara_hd_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444649/normal_5fca82cf6e4e0.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/xafozewizapovufun.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/portuguese_pronunciation_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/ggc3QUe/skylanders_swap_force.pdfIn PDF document text
    • http://jolixasij.sportsontheweb.net/72322785351.pdfIn PDF document text
    • http://mozaduz.mygamesonline.org/xidebadinuguvuwalir.pdfIn PDF document text
    • http://larokamexi.sportsontheweb.net/ramawevotujag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424630/normal_605826d9c9b4a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gigavebeno.rf.gd/telugu_calendar_2020_free_download.pdfIn PDF document text
    • http://robebiwasufilu.epizy.com/dediluwamolesofevubepoged.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/11410413648.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/79863512776.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/ruxirurarafineruni.pdfIn PDF document text
    • http://gozudil.onlinewebshop.net/12315815692.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/16130826289.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/28849188369.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/how_to_test_samsung_ice_maker.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 5276 bytes
SHA-256: 6cc4775c5a48a535686f7f31d4e2c4fda936cdd597d6f5a94acfb00c4750eedf
font_01_sfnt_off00010815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10815 10508 bytes
SHA-256: 6dab09102bf595ce1864e822b82b12d05e5fe6008c08405190815b79df771662

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