Malicious PDF — malware analysis report

Static analysis result for SHA-256 c27474d7a871014b…

MALICIOUS

PDF

100.2 KB Created: 2021-09-02 20:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e8a90211d7a70e1f251cd73c6d5e348a SHA-1: 26cc21b867f61a8235cf60844066f5661c98f659 SHA-256: c27474d7a871014bfa64679fa55ad7ba0af7d0078e74e68025142226c7e47fa1
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm, indicating it's designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://crewmak.ru/uplcv?utm_term=pathfinder+kingmaker+game+guide+pdf PDF link annotation
    • http://parethumukalchurch.com/uploads/file/2662823111.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/tofijivasasivofugexam.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/10816798153.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/lezepumegoxojoruxotuvane.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/8l4gns69pr5tfqif1k3b0acg22/waluzorugekojamelolip.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/womerakubezodagavotag.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/galelixasabebina.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084783a6dfe8---vevejizumuzadodenuxetonis.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/1a7953113a36bfa04e4d9ab9369aae9c/pezamakoxonitevoginudaw.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/61112826059.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/nesasutokojivu.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5d7038f2d87a57ae52682348d7c1fe68/39908554686.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/tirufixesebodesapomugalu.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/7472024915.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/kovuzojaxavameniwapavavej.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/3u53ndb5lmpgb33mgvq1o31c5c/dewujutituzu.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/zemufazafe.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087751d27d39---sabevetewogibuzere.pdfIn PDF document text
    • http://gesundezellen.de/neu/userfiles/file/25575699403.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609636c39ffe0---miregupukedaxenojuka.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/2177591023.pdfIn PDF document text
    • http://guides2alpes.fr/uploads/file/jefoxe.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/gabuxedafuximaxejir.pdfIn PDF document text
    • https://datajournonepal.org/files/xivivoxekumanativuwu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CD 10804 bytes
SHA-256: a6be04c259d36ff3081a206720f22676646ffe56c17022986479e27e90711638
font_01_sfnt_off00013b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3F 18340 bytes
SHA-256: 79a0c097296fcadc56fd2524922e1908a90d49e1cc5baf2d83f500678d50bf39
font_02_sfnt_off00016aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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