Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00269177348cf46…

MALICIOUS

PDF

104.9 KB Created: 2021-07-24 09:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e830c82ad6e3be51384c1f4b7bd17161 SHA-1: 8a00d5cf5b8758791f43dab37b22ab4db84db4ce SHA-256: a00269177348cf46880158f41eab0354e577b47d1b98d12b253e3adc0fbdcf58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the presence of numerous external URLs and the heuristic findings point towards an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 http://anhbanglaw.com/userfiles/file/97131081681.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8dae85cd---52114956896.pdf
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8d1b8dbeb34595b5f45e328bca29b0ca/dafaxonejelibovikewatane.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3c57e137a086af6d9c766b182667cb1f/55359604525.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/4e5q9lp9aut7pv7fi0bime52o5/dupirefugone.pdf
    • http://17njl.com/userfiles/files/xafasetavusu.pdf
    • http://thanhnhomdinhhinh.net/uploads/files/71655667515.pdf
    • http://matsonconstruction.net/userfiles/file/muvomabugovolepifabete.pdf
    • http://mygiftltd.com/userfiles/file/zenifavo.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/61165890f9f4eb6bab40f2a15a7a4b7e/lagal.pdf
    • https://beaszemin.com/files/43832529475.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c578c677873176d74419759c131ac5e8/damomajojusibugelimad.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/hcpopvkh6tjaa7g01d0b4025hu/tatitiguvo.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/7j74p792hdkq9mhbb8gku217p8/tujoralomipibiketewoz.pdf
    • https://rabudiagnostic.com/userfiles/files/87746234585.pdf
    • https://cardion.dk/gfx/fckimages/file/purajezirawunerad.pdf
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f05cf7c88a---38564388539.pdf
    • http://www.aluvascientific.com/UserFiles/file/54961908048.pdf
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/83d6fbc32b5b8c05a062b0e36f0b4ccc/58621384873.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d15e6727c---tiligajubonakejuv.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/213d138b16d15f317fb6d4ccd5638be6/dusadumutonekavus.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9ee1ce92d---dasinosukok.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=geometry+dash+mod+menu+apk+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ec5.bin
9632c743651c1f35d9b26a7e01aa4af1efcc463a3bb6c8daf10444d59da376f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EC5 17536 bytes
font_01_sfnt_off00014cda.bin
0c133022d1e9883d2ff7035cf84f1fa0be9cfa0d671266bc5a940283bc0f9855
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CDA 16376 bytes
font_02_sfnt_off00016302.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16302 16792 bytes
font_03_sfnt_off00017b19.bin
5113111ceef439f067d890429515254b5565d7632ee1de215cb16987682cf7ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x17B19 10996 bytes