Malicious PDF — malware analysis report

Static analysis result for SHA-256 9babdd877396e875…

MALICIOUS

PDF

100.6 KB Created: 2021-07-27 23:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8f22f9332cb77fefdada60e395d443a6 SHA-1: c2231ef70e2073bf448462b4e0b0ce2db96bd07f SHA-256: 9babdd877396e87581b5ae251bb736b5999491629745cee1dba904fe9252afc3
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple disposable or compromised domains, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://ozdoby-betonowe21.pl/Upload/file/46386755438.pdf In PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/bodakepuxegatejaruweboki.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/162343172733.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/fuwib.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/rufaxofaxuvu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1609508b2d4388---lalawogukofajugotin.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qqic5hi0u08nsqk77tmbirufm4/82507363951.pdfIn PDF document text
    • https://rcvizovice.cz/ckfinder/userfiles/files/54047519962.pdfIn PDF document text
    • https://egf.tw/test2/images/file/354986550.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a0d50ac79---83018033796.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160edd1ff9f6db---45042182321.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/16675983854.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e27a7b26301---bowajidilujaxafe.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/33224656969.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/lofoderatatubikixusaze.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d934bbe5e3d---25811359435.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/f2e7d3fc6f211d7c8be54c5868c6f5d2/dawoxevipesogep.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/68777790940.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/p6seumpnvbgvh2ihd5vd96e7j3/fanajixo.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/890715014.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/mejajirixele.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/gogidabuwef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+get+a+declaratory+judgment+in+illinoisPDF 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_off0001227b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227B 17484 bytes
SHA-256: 0b67bdea817bb7a783a84222f069d830cc727fe1c754812066ea000fedbd5bae
font_01_sfnt_off0001507f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1507F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16896 11136 bytes
SHA-256: 34f75254a7f3acfeb6d0ce574bd5e026caf45b912d55a757f70febeaa6b83e2e

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