Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63ffbdbe5994b5f…

MALICIOUS

PDF

82.1 KB Created: 2021-03-18 05:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c6076a6a5b842198f1e12bc3ca4f1571 SHA-1: dabbc857dc7a4cbf10ff269b67a81ed2956b6e90 SHA-256: d63ffbdbe5994b5fa6118582032b4c6bd9374a8efd70a31aadb63187b3b7c96f
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-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://dafemum.ru/strik?utm_term=how+to+reset+rinnai+control+r PDF link annotation
    • https://fakedowekiz.weebly.com/uploads/1/3/5/3/135314463/puzabo.pdfIn PDF document text
    • http://klossheff.xyz/sketchup_desktop_app_freerscn8.pdfIn PDF document text
    • https://sifixiwip.weebly.com/uploads/1/3/4/5/134596292/tovulavuxujejapubune.pdfIn PDF document text
    • http://everydays.space/xubegorevdwj84.pdfIn PDF document text
    • https://rurikuzusobow.weebly.com/uploads/1/3/4/8/134879219/8445962.pdfIn PDF document text
    • https://tetabiga.weebly.com/uploads/1/3/4/0/134097499/sonajokutupeli.pdfIn PDF document text
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/09f8a185a90.pdfIn PDF document text
    • http://ligexekena.mywebcommunity.org/31059394963.pdfIn PDF document text
    • http://rarubife.mygamesonline.org/alphabet_phontique_international_arabe.pdfIn PDF document text
    • https://midatapeb.weebly.com/uploads/1/3/1/0/131070166/b0e6fa554f194dd.pdfIn PDF document text
    • http://swiss-gear.shop/82849340968qbt.pdfIn PDF document text
    • http://detonic-shop.website/rhinestone_eyes_sheet_music0uuox.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/contaminacion_de_plasticos.pdfIn PDF document text
    • https://pelimabogex.weebly.com/uploads/1/3/4/6/134685965/1d647a111af.pdfIn PDF document text
    • http://klokisik.space/debijomirobalagatonilapqfm39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/73382773861.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/lanuwul.pdfIn PDF document text
    • http://kafotafuvodalix.onlinewebshop.net/blinded_by_science.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/kowobitimetivezuwixelog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d71a01-3792-4522-be56-dbba74ec81ed/what_is_a_good_workout_plan_to_gain_muscle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca5f892-3ed5-4ea2-9c24-32d0cfa9ba30/bowenizudarutabujitojo.pdfIn PDF document text
    • http://dojorunubi.myartsonline.com/pajumanar.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/genarobozirewedaxiji.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_off0001030e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1030E 4848 bytes
SHA-256: d4b17e32837ff226b4ec328a00a9c17b11925f493be850fee764d92e7733215e
font_01_sfnt_off000113a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113A3 11160 bytes
SHA-256: a1765e97144f073da8cc5953947e3ffe900729a30a18caf6050943156687bf2c

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