Malicious PDF — malware analysis report

Static analysis result for SHA-256 317e295f69ce807a…

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 16:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1ea9947daaa42fcf8ba3e866dd42f01f SHA-1: ef0d4001807c10ff2b267fd0bf96e0a4e7684a9b SHA-256: 317e295f69ce807a71a2babb5cd5bb6b483ecbff624e063395ae50d36e50c06e
176 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. The document contains a link farm pointing to multiple disposable domains, a common tactic for distributing malware or conducting phishing attacks. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/18119389765.pdf In PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5fff0fcb054f71825f713caf3b3d24e7/tavepixorutowamaji.pdfIn PDF document text
    • http://boldino-hotel.com/ckfinder/userfiles/files/wofedokabadofomiginowuras.pdfIn PDF document text
    • http://urduhadith.org/survey/userfiles/files/86821418013.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/67450194122.pdfIn PDF document text
    • http://metalltechnik-kutschi.at/41730014701.pdfIn PDF document text
    • http://scsytech.com/upload/files/tuvefilakejefasadufuvexo.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/tewemabowimonutew.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/32de4c4453a78bbf7e6ac6b634096093/nuwarikulid.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/voniwikopikuvek.pdfIn PDF document text
    • http://canissapiens.com/images/uploads/file/nimazadidukijozowof.pdfIn PDF document text
    • http://squash-fitness.cz/userfiles/file/divewufabasilipupipowil.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/97964948ab89115ee8899afa2d7d8a34/85088672119.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/72858021254.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/51597145397.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/47972843544.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/68523318282.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/pajat.pdfIn PDF document text
    • http://gordostcrista.ru/userfiles/file/90528229549.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee666df8f7---tukaxamuj.pdfIn PDF document text
    • https://ancoraeducacion.com/images/60475903798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+send+picture+from+phone+to+pcPDF link annotation
    • 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://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_off0000d45d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD45D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 18324 bytes
SHA-256: 097541d7657df6c66856a092a429f5574fc46f2fa158b0658e2520ad10ecf24b
font_02_sfnt_off00011bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEC 10856 bytes
SHA-256: aff3675cea267eccad3796a8e1a83e23064c0fc410f7ee20b80909667c09cb19

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