Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca29f2f0e6373ac6…

MALICIOUS

PDF

75.4 KB Created: 2021-09-07 00:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 353c8d39b6c838d228591c9f23ecf598 SHA-1: 9d49966b41e8357a263ccf4d7926a030885feafb SHA-256: ca29f2f0e6373ac61f06b10068b4829982d181658363166e8d81d83ee5b2f5ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and numerous external links point towards a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160ee43038feac---95412426450.pdf In PDF document text
    • http://amphorabeautyclub.com/campannas/file/69604438356.pdfIn PDF document text
    • http://abwcockeysville.com/uploads/files/jotija.pdfIn PDF document text
    • http://fluellensoflandreth.com/clients/b/bf/bfbe38bd58d8cb8bd08b82175287e3b3/File/kuwuzira.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/gadenigatotiso.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/75315964620.pdfIn PDF document text
    • https://olterus.info/contents//files/bimujotasoliwizumo.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31fa8b775b---1679223453.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/pasutexukefal.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d8b1a3227---79329763377.pdfIn PDF document text
    • https://mabuksusu.com/contents//files/katidub.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/wilunodinesetop.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/bisabogajebiwozakus.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/07ee10e6c8fc596a9cb7843c2060b126/43827842157.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/lcro5l9ncvu2hi7c41rrgv0956/vepanotijikumavix.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e570e0680---93265908109.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/tevuremobowowolubokowu.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16099e9da38586---75818326098.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/lovolanitojiv.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070155b15c3f---16449381765.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/26345046717.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b54d58585b---59904013353.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2466b0d20---38953054201.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b9f8e1585a---70306962024.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/79509d34434388f0770830e4788ecb93/81323174405.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/modusuxe.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/61909084815.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=five+finger+piano+songs+pdfPDF 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

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_off0000c542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 16744 bytes
SHA-256: 6becd5ee6dd5867b31754b071d878903ab100b48e6d22f6ad84f6ae73fb6d0f0
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 10572 bytes
SHA-256: 345185e3fbeff0eb79aa34c1bcc34b4c5646933e3e46a3aca0b81fed5b2b2447
font_02_sfnt_off000107f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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