Malicious PDF — malware analysis report

Static analysis result for SHA-256 c077b72bdb423507…

MALICIOUS

PDF

84.0 KB Created: 2021-06-27 02:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d40d52dc223db6838aca4639731cc13 SHA-1: 6a30d6579f947177771b6430b9b980533b19b5e6 SHA-256: c077b72bdb4235073531de060fe021bf084060856bd445dd5203c7cf7ed3c6f0
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. The 'SE_CLICKFIX' heuristic indicates it uses social engineering to prompt the user to execute a command, a common tactic for downloading and running secondary payloads. The document also contains numerous links to external sites, many hosted on compromised WordPress installations, suggesting a link farm or distribution point for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/1o3fvh40arm6hge6974v26mae2/fawesoxugor.pdf
    • http://accomplishtheimpossible.com/userfiles_ati/file/6785916326.pdf
    • https://areicon.com/images/file/papojafitivamudedujoged.pdf
    • http://lawngo.net/fckfiles/25678159900.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160850a98ba868---44841419720.pdf
    • http://okmarin.ru/userfiles/file/minonuxerisap.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/fpea4r6ah90qg57ukqvbt7o4vh/88933178038.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2c65d60404---99033961816.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5ca7347d3---79935406917.pdf
    • https://nguyenhungstone.com/uploads/image/files/44102184031.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d171126c7c2577c67832414b46676d14/bagabudaluxesoxabasaj.pdf
    • http://provia-events.de/pics/fotos/1/file/sulemulirafovivimaxapawam.pdf
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tozevuvamekiku.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83adbc531f---majifavagoxovup.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/9699a2f97ea1b6b8b36274e6eb340431/buluzovamipulire.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080bd3fb85b2---66453946692.pdf
    • https://cengilli.com/icerik_images/file/78452303910.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608719c957f8b---20057917056.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4db98523c---wotunegigiron.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160afdc331db2f---75574835862.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/gehklbkqlbill78h58l0mtqc51/52517825650.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=windows+device+manager+command+line
    • 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_off0000e386.bin
fe12a6ea8838cd7cdef32fcc30bd95c9dae7e07f4d5a9052c4f27f3c69b3b5d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE386 10760 bytes
font_01_sfnt_off0000fc13.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 16792 bytes
font_02_sfnt_off00011425.bin
3c0332adca9da1a864bc7bc632bdb2d0dd4d2d1137b4e913f12c398f13926f62
pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 17816 bytes