Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2c20065dbc92792…

MALICIOUS

PDF

83.0 KB Created: 2021-08-01 02:25:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 559ce567504652c97c267aa0fe4265ed SHA-1: 9c1c59bbcc7cce8eef07069faf417406fa08c72c SHA-256: d2c20065dbc9279228f61b1cfe4db831f4b08460d3ab8d5878a1e95cad723072
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://boucherienabli.com/uploads/FCK_files/file/bawiraxijixafegojip.pdf
    • http://engroupe.ca/aym_image/files/tezepi.pdf
    • http://backupcenters.com/userfiles/file/58389733167.pdf
    • http://seattleteriyaki3.com/uploads/files/49414083638.pdf
    • https://airflow-skateboards.com/upload/file/puxijodosowadanikeliboba.pdf
    • https://bruceautoservice.com/files/file/ratubemibasa.pdf
    • http://n2nnetworks.com/files/others/11639313175.pdf
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160909b2033985---25939908196.pdf
    • http://thehigh86.com/clients/13680/File/91409731950.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/76bb31071fb9b0b07202f64fc8ba1b13/28985883136.pdf
    • http://adamlegal.com/userfiles/file/67867223837.pdf
    • http://yasaitogo.com/uploads/files/41640800640.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/1306196913.pdf
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/6e553925f5fba8665d2696cc2345bddc/relidilizufoliw.pdf
    • http://emilygrilltogo.com/uploads/files/84287618102.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5cf51bdd97---gatusomikirugitupixe.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c06773656e1---datuzalivininuvi.pdf
    • http://kidsjeodo.com/images/files/98665479723.pdf
    • https://daxitrip.com/basefile/daxitripcom/files/36312403119.pdf
    • http://patokapugsnkisses.com/clients/61143/File/88026914014.pdf
    • http://physio-praxismitte.de/userfiles/dadikaxufusisulo.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087ba99a84d7---rakuw.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0797a2287---64414139789.pdf
    • http://cdkkck.com/uploadfile/file/20210531032653.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+ritual+magic+manual+by+david+griffin+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_off0000dedc.bin
2c8853f160500960abf94f790f9f984525abbd9708d885ce74e9a5dea50650a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 11160 bytes
font_01_sfnt_off0000f85f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 16792 bytes
font_02_sfnt_off00011071.bin
af139f0db0883692bbc6fad5a06ba09ca307cf5214541dd244c079f207432a30
pdf-font-stream PDF embedded font (sfnt) at offset 0x11071 17232 bytes