Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb63397fca4375d…

MALICIOUS

PDF

73.8 KB Created: 2021-04-02 15:08:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3c4e0c203d696010f2b6a9ae51491c5f SHA-1: e061ed7cb1620e65189c77e89740d7b36976d9a3 SHA-256: deb63397fca4375da070b972621cc30ca8e5e82c3a076ad6473c2c812526f841
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9997

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://gimoguvi.ru/wix?keyword=scientific+notation+worksheet+works+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403131/normal_602bb1abad8fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465390/normal_60270e4b577ca.pdfIn PDF document text
    • https://cdn.sqhk.co/tarozawowe/jjfzQBx/tejozejixeluz.pdfIn PDF document text
    • http://merishwheelrecords.com/bemunumaxapokuzikedalp224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460466/normal_60146825c9a85.pdfIn PDF document text
    • http://pasendapp.online/how_to_fix_air_compressor_hoselxv3r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484380/normal_604d0e778dbaf.pdfIn PDF document text
    • https://cdn.sqhk.co/josipinu/ehggi23/unblock_ball_block_puzzle_game_apk.pdfIn PDF document text
    • http://jakartapro.xyz/bizipanatodefogi48gxs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_60392edf8bb8e.pdfIn PDF document text
    • http://myfoxing.online/6548229381rs43l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379240/normal_6035b8141b494.pdfIn PDF document text
    • https://cdn.sqhk.co/mejabutumu/Drohcjj/cat_1000_peak_amp_battery_jump-_starter_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/1dZ8ijL/roblox_unblocked_games_24h.pdfIn PDF document text
    • https://cdn.sqhk.co/faserekino/gdidPf4/98918992598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_601392d8717e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_1b10dfe2eab5409eaf51cfe4a3f3e70b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/defuvuvofekofu.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_6f5711bb0f6c42fcae8b94092e090ec9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kewakuko/48214331343.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_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 5196 bytes
SHA-256: 3024c6af3452bd4e40354ec0051a7b5d741639a22cb0eee4034d55e6c16a475d
font_01_sfnt_off0000f6e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E0 10252 bytes
SHA-256: 33eaf07e4b97788b468bc63789e8ea6860b79709b90c4afc24e2fa077b95041b

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