Malicious PDF — malware analysis report

Static analysis result for SHA-256 98e985454a5c35fb…

MALICIOUS

PDF

90.9 KB Created: 2021-07-05 04:13:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3ac2e40953d6fb437d21f5f0032d59c9 SHA-1: 3eccdec61b1e35a6b8414580d30d03b1dbd02abf SHA-256: 98e985454a5c35fbb2ba9f9393974aa935556c9650a6b6fbe7f306e541214252
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload storage and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The primary attack pattern involves redirecting users through these links to a malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb92430c76---31468221071.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e44655eabf---bumigewabo.pdf
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/b40c8bdb73fc3eff86e0eb6f36fb0f74/luvofiwodesomexa.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce9b8e718a---zupov.pdf
    • http://chretkinia.pl/userfiles/file/dubufatevixujesop.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092038ade651---3131136407.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/45a878188952ed9a14ea0ca48c17be25/jofukijidalujokax.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a6b162ed1---gosonojewakosupari.pdf
    • http://badaranquehablar.com/userfiles/files/wojukar.pdf
    • https://afra24.com/basefile/afra24/files/71478933794.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074a2b0103f8---kufogebipabidoxixino.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080cd07f0256---vozununebosejarel.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/c9000cd3830df09d828a3b2dfb57fc6c/67735204885.pdf
    • https://mamo-tato.ro/userfiles/file/xuzibobojemig.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f563a61e30---fikojepitilajumonikapo.pdf
    • https://hainutedecopii.eu/ckfinder/userfiles/files/77025068979.pdf
    • http://elitvorota.ru/f/file/6697808787.pdf
    • http://ttlh.vn/storage/ckfinder/files/14240223932.pdf
    • http://musorcentrum.hu/files/article/file/dojavixekuziti.pdf
    • http://lncxjzxxw.com/upload_fck/file/2021-7-2/20210702212459455630.pdf
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/idmco9aie022gj25c06cfchte5/34651772920.pdf
    • http://prosquash.by/data/zewiwomuruxadixoxovimoga.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef9490bfa7---bexikezulozexi.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b5fe8d427037bc18fc5f04ad49d47cb5/27896414526.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e7962483a---linabodikinetopatu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=aoyodkg+tablet+instructions
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f41e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 16792 bytes
font_01_sfnt_off00010c30.bin
5e6d2dd6dc326bef5bf934cf958683ee6b0e1c5b35c15231e6b407fdbeef0a18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C30 18632 bytes
font_02_sfnt_off00013c95.bin
6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C95 1692 bytes
font_03_sfnt_off0001449e.bin
100fe4722e96c4db6640d7660f58e855aa6683e399692c0f351615a2c990a4a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1449E 10972 bytes

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