Malicious PDF — malware analysis report

Static analysis result for SHA-256 592e6eb2b5a2f09b…

MALICIOUS

PDF

89.5 KB Created: 2021-07-13 18:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fd14e4c7ff8dab6da1aa6860b2296f4 SHA-1: 65856df0f9f7f8646e22578248945fe7b891bdeb SHA-256: 592e6eb2b5a2f09bffcd75baaf464c35deb81362547f4f28406e50f95bef96f8
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The document's structure and content align with common lures used in advance-fee fraud schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://inwebjor.ru/uplcv?utm_term=longford+to+derry
    • https://stradatextiles.com/upload/ckfinder/files/somaxegukajefivafale.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ae82127e5---89801469053.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d51a387ed7f---bupozesasujuru.pdf
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/1e0958b066cfdcd28f749c88d2e9464f/zakixaligipatufenolapefob.pdf
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bd25c86a---17759922702.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c45d8300ac0---11219782658.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877d3590eb3---17662624107.pdf
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/de75e4d530cfdfa00375a01b8b09baae/bopup.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/cc45d86c94bbe1f1a0f083f9dfad8070/71921183401.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160980afbb20fa---furukawa.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607531de8eb21---zigofaxude.pdf
    • http://aceonlinementors.com/userfiles/file/33847657580.pdf
    • http://allprintusa.com/admin/images/file/buxejexerixefef.pdf
    • https://yocarbroker.com/upload/ckfinder/files/zujij.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0de1d6fde---gazotezaresorij.pdf
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/c589a4db5f78b1f62aa839405dd82639/4800776676.pdf
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/vetetoziwenabutelivu.pdf
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/5d1mhv4o3vtvbhr074ln3ava1d/vizowogawukabaxavovo.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a77d7fece54---56871780484.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/8a0snhbifk0k52a3tju1getqe9/fepivegepegezarufibef.pdf
    • http://ahcxdq.com/uploads/file/281845006113.pdf
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083bee06d4e0---sizareketizodoturuwawi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa98.bin
ebb517670d4f5b7915193ec83d8c45a89192be8f8c08d341c07d7ec379d6e179		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 10132 bytes
font_01_sfnt_off00011125.bin
a9db98e5b5c70264729a77694951acfe1189163ba5c501d4db3e4d0fb7b6d690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11125 18848 bytes
font_02_sfnt_off00014130.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14130 16792 bytes

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