Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0448132d5fc376…

MALICIOUS

PDF

70.4 KB Created: 2021-09-02 07:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ce70f82efa6eb8c4b055ccbc4b171925 SHA-1: 4c3fb9632c552fe55764c8753b1261c8c108907d SHA-256: 0c0448132d5fc3765a3f26f85debfd4b12d3e24ab0340402db213de460ee4def
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress upload directories. The presence of 'utm_term=converter+from+pdf+to+word+online' suggests a lure for users seeking document conversion tools, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://aldea.work/wp-content/plugins/super-forms/uploads/php/files/459b0bb3137cd50c95673247fd8418c4/kodofuxixonowatoremofol.pdf In PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aae9a97ddb3---vowifeto.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/diduk.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/zirajaguxaxaj.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160999739c1b38---48619812132.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/soxawatofogosisavev.pdfIn PDF document text
    • http://carriewoodfamily.com/clients/5/5b/5b9f2fb360c4065436fb7fe1267c3612/File/6577525630.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d098cf4154---mirabadixovut.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/98e79ae53c7bd4008c293294a5d7a21f/rekuzelezado.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/54333574099.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/47717032442.pdfIn PDF document text
    • https://agatanorek.com/files/file/gubibapevivilewurale.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/94178843306.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/fukozis.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/b6a781bde14bbfa6431cf97acd930c41/tidapivire.pdfIn PDF document text
    • http://klubalfa.org/img/userfiles/file/38113151675.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/6t346o3p05emdrbmatjv9o94ge/pogabezutazakeruto.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/fg5tfhahvgu8j3msvpivbi61p9/nuzilowofefuguvitawom.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/lopirubibifoxufe.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160acc846957e3---52938828637.pdfIn PDF document text
    • https://reniuved.it/file/siwapowokadivogoril.pdfIn PDF document text
    • https://www.groupenahno.com/wp-content/plugins/super-forms/uploads/php/files/nqnh03aepcbc6m41v4bn88ldou/davolizefojikeja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=converter+from+pdf+to+word+onlinePDF 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_off0000b2d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2D1 10512 bytes
SHA-256: eb48600142c3d433d77a4ac961889bdd9d77e2b1598d9eb16fec5c22dea97ac6
font_01_sfnt_off0000cabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABC 16236 bytes
SHA-256: b98f8209e3c90eea47837091d34e29775860f95d3909a0336ad06ba2a58ede53
font_02_sfnt_off0000f423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF423 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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