Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4599dcf5588d78…

MALICIOUS

PDF

93.5 KB Created: 2021-07-04 23:25:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58a4f3b469f33feafec25e388fd624a1 SHA-1: 8a610b8f3737acd4fad026ef7618ba96a2bebf39 SHA-256: 7d4599dcf5588d78aa1d17bc81aa7c71bcf5b40d0122c802061aa866f683ca91
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 to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting an attempt to redirect users to malicious content or download further malware. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates the document's purpose is to deceive users with promises of prizes or funds.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://laborke.ru/uplcv?utm_term=how+to+get+ripped+fast+in+2+weeks
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71f816088e---81599207012.pdf
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0afbf023f1---mavutonatab.pdf
    • https://contactfm.be/userfiles/files/wexikabujaxatizu.pdf
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/olppo4n5hn99q2dojo1llhla0i/pubutebojeruduzaw.pdf
    • http://nhadep30giay.com/uploads/image/files/92971749754.pdf
    • http://momsystem.ru/public/file/wobejogovowif.pdf
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/52ca21db0ddf51c2b900a09a3317c33a/37698853023.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d42e79ec7d---94497740181.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a428aa26a5---zijoduzuramezumovufojageg.pdf
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ttqcm9rct15a2a06sbbrbck0i6/57781417046.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0a703272---40459551069.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e8a2100a1---44923499606.pdf
    • https://agrilaui.com/userfiles/file/28515937426.pdf
    • https://lifo-sea.com/ckfinder/userfiles/files/98217191566.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/abd5415bcb568dd2c30495507aaf0a99/dazikiwatavivib.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608d06d02f9dd---71919820879.pdf
    • https://stijsr.com/userfiles/file/widitikobu.pdf
    • https://computerzone.pk/file/13259824699.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/7384076f495bebd6a69cd09ee4079c6a/junutorisijibaxige.pdf
    • http://strandedtattoo.net/file/77182308795.pdf
    • https://agentcctv.com/userfiles/file/jubufuzisemif.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/3455315521.pdf
    • http://caopump.com/admin/userfiles/file/84439528779.pdf
    • https://tylbm.com/Upload/ckeditor/files/97552520859.pdf
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/fbe32fd4b7db296773687b19ea385603/95943050846.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_off000109bf.bin
0a1cbc94dcd6768fd754f79564ca90f095cc172838a69976e9c0985460006ccb
pdf-font-stream PDF embedded font (sfnt) at offset 0x109BF 17468 bytes
font_01_sfnt_off0001374d.bin
5cba3ca3067599441bb49fd8d1c6af33fe894d63f2ad1d110f03dc384836b540
pdf-font-stream PDF embedded font (sfnt) at offset 0x1374D 10916 bytes
font_02_sfnt_off0001509c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1509C 16792 bytes