Malicious PDF — malware analysis report

Static analysis result for SHA-256 2365046839445c13…

MALICIOUS

PDF

89.4 KB Created: 2021-07-22 05:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4397d08564b99b57ae11264db59c897a SHA-1: 8cffb06eb18fefbe69ae9ba4cd6959adce7d3fe3 SHA-256: 2365046839445c130b46ebe02fd9aa6b883fdd622de70c341981785981a230b1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm pointing to compromised CMS uploads. The document body is unreadable, but the presence of numerous URLs, many hosted on compromised WordPress sites, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e3c529cb4c0---jiwavipimisojepokufelavuv.pdf
    • http://bensonlandscape.com/editorData/file/guresufametugapoxupebum.pdf
    • https://aashianarealty.com/file/jolupodebuxopopajo.pdf
    • http://matstravel.ru/userfiles/file/9386302143.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/k4l8pqe5hc76q61i5fmk8tprdv/bimetowuleke.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851ac2a4ff0---73371102434.pdf
    • https://mvservice.it/file/34160770032.pdf
    • http://angelofthewinds.net/ckfinder/userfiles/files/93047413174.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608487a36baf1---muwodobaru.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba54f29b86c---kirar.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d231fe90f04---savalamigabelagemanev.pdf
    • http://2478.ru/admin/ckfinder/userfiles/files/terop.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/s7g3skrcdtee13brvmd10ji16e/47700804158.pdf
    • http://travellightnepal.com/userfiles/file/nivugaxul.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160871e66e0cde---61034726181.pdf
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b708745fe9c---puxoxojikozonuzigisof.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ad70a1d22---vopiramovoluta.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/d51442dd0f228608860a9e3289697505/mezugoverar.pdf
    • http://jiendurancecoaching.com/ckfinder/userfiles/files/56235553018.pdf
    • https://ijmscr.com/ckfinder/userfiles/files/vakuwuwelinuf.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5877f3ba70---dakugotaruzubakag.pdf
    • https://teamcode.net/upload/files/28063672798.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/dafee831c8c2dd98d4aa01f0309edc3b/24628705732.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/vb6pectsehqol2qa3achp0m0n1/75039270888.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782cdbc0470---2233086941.pdf
    • https://fanaf.com/article_ressources/file/safowijokotokosalogexiga.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+connect+a+dac+to+an+amp
    • 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_off0000f86d.bin
dd4be557bb459c50d7a904592456ec77f885a9a19c6ef56bda8450426bea559f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF86D 17868 bytes
font_01_sfnt_off0001278a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1278A 16792 bytes
font_02_sfnt_off00013fa1.bin
500945e75592c500acfaa968356c0a0e6ec74855ab79b34df3ec17452c4f439e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA1 10344 bytes