Malicious PDF — malware analysis report

Static analysis result for SHA-256 d70250c0aeb2fbf3…

MALICIOUS

PDF

72.1 KB Created: 2021-09-06 02:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc7c9bb4a1c798a318ac1099cb847630 SHA-1: 32746349432720b0a8d2f772c96babfbaef13c4d SHA-256: d70250c0aeb2fbf3992ef956800f3ed55b7eaf130a4df11a0bbdd4e7afb38b04
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to other PDFs hosted on compromised or disposable domains. The primary purpose appears to be directing users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://photou.cc/ckfinder/userfiles/files/ribapazoguk.pdf
    • http://ugrctrani.it/userfiles/files/16269416951.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/3ed058306d579ed0b57669fd2c6e7813/59970669235.pdf
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/bdn8nqquhr54ktlbk892707l1i/938105543.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5ec9ed54e---4053696443.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610f1b47c93f6---83795106178.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/sl9dru2o12aetm272d79p36vd7/kareku.pdf
    • https://wupaojichangjia.com/d/files/komibarewabibefuxugi.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086efe758098---99978532942.pdf
    • http://elsekmont.eu/userfiles/file/ninotukilodomimigoba.pdf
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16114638410a76---24914305735.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c113599089d---pisexivazuxelekaguzev.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/3e82ffmerrb6o3e34esp26h8qr/53258632622.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/7bfebfba0fdbea69f4cf4267dcaa65fd/luvutorakut.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608df8bba504d---61433351873.pdf
    • https://mwasafat.com/uploads/files/92544944820.pdf
    • http://eotp.info/sites/default/files/fck/file/61739791907.pdf
    • http://ergo-logo-bamberg.de/userfiles/file/50973334822.pdf
    • https://tvsporedi.si/vsebina/nisomiloxobetubib.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/spsif7pbggqmmblfhaf64gsqdb/pipogesetezewupor.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fcb569342---25548318027.pdf
    • http://tmtechvn.com/webroot/img/files/lexafemetenenasot.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/384da4aefd2285290e5c5402822701bc/pijuboku.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=much+many+food+exercises+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_off0000b78c.bin
6ea616d8c1f45dea51df4c14a3b11ef6f5f462806150b099e6b5c2e987144caa
pdf-font-stream PDF embedded font (sfnt) at offset 0xB78C 16928 bytes
font_01_sfnt_off0000e1b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B6 16792 bytes
font_02_sfnt_off0000f9cd.bin
7269545fe091482958930dfe18e659b01459f10b9d6758d4e191d16b175e6582
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CD 11048 bytes