Malicious PDF — malware analysis report

Static analysis result for SHA-256 29768f14d915a35d…

MALICIOUS

PDF

88.9 KB Created: 2021-06-28 05:19:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3539e1d4bf2f3d7b854c3a9095bc0ba7 SHA-1: d74c76ee207f75e3f61640f0b08e1a2e77fea5d2 SHA-256: 29768f14d915a35da351ab35fdb3341b8b08506ff7f5b6840cc345e73e4f2415
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as a link farm pointing to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. While no scripts were extracted, the embedded URLs and the nature of the heuristics suggest the document's primary purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://airshow-bg.com/file/pasamojaremotubumukor.pdf
    • https://atamergranit.com/userfiles/file/14475614110.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/pkaf6ce9klv7qpa21fg2i4brfj/valagigadoziduxisekulodir.pdf
    • http://meteosputnik.ru/userfiles/file/ravevodaza.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/ne5urka50o9utaamr9k74n42qb/sufumesenonima.pdf
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/fe5d369f7358541568fa343423ea4b31/4029607269.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/9ad964fe0d112d3e27c6d331f2b02978/gopinasadijazejizerikewo.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0dfc2fdd3---23369747188.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa41e2621f---8647669583.pdf
    • http://sharise.net/Uploadfiles/files/fewopumupi.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e5ca06b7c---jerasu.pdf
    • http://optikametuje.cz/userfiles/file/ruwixonerola.pdf
    • https://hanahana.vn/media/ftp/file/texivilawuz.pdf
    • http://bpabv.nl/uploadfiles/file/20179368056.pdf
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/cc23f0a9a779e95b68b0dfb4f2db1f05/wuxurutibirubetunujijub.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1970956b2---40445481956.pdf
    • https://alihuata.com/userfiles/file/ridikudetu.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608461117c471---jametivebu.pdf
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d0238d6c1---34435676568.pdf
    • http://studiopignotti.it/userfiles/files/jugorokufarorixalanubituj.pdf
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/fs967ipb25lanv891t6t5segav/73077656277.pdf
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/f35d2be910eff4ef0bc88cf50b9e4969/25048622493.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/b24809fc0420e3c729fe1d6391ae9aca/refuwaxuvexupugol.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=different+forms+of+parabola
    • 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_off0000f893.bin
3529e0c8fb69a4885a0d3b48484fd0c81c8d0b4d0ba99ba6fa44d1f9b47c7a38
pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 10660 bytes
font_01_sfnt_off000110bf.bin
e9ba3b7f392d27a6c34b27e8837006500e888feca8de73846a717d4de8d4922f
pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 16836 bytes
font_02_sfnt_off00013cb9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB9 16792 bytes