Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1f449d4d7e4d85…

MALICIOUS

PDF

113.7 KB Created: 2021-06-26 03:35:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 445f3f5ccd6963c9751aea8236b4ce7d SHA-1: 0d413220dc0f8ed98b5d9c4b7bb29b7716833091 SHA-256: 0d1f449d4d7e4d852bd1156c0b72dd8730f8d16d8483c8fa3bb9ca3c40a2bc0b
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning model and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised CMS uploads or disposable hosting domains. The document body is unreadable, but the presence of many external links suggests an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://monkey-do.net/userfiles/file/wepepixewekumux.pdf
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/pataluzuzo.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/571e7960de0fdaecce60425a371f920f/66757884852.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607899a8c3644---sevazomazujilit.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/68b2ac81451c607520fc44c61d7e95ec/lalogomisopidalipij.pdf
    • https://kamarkosong.com/contents//files/90724769258.pdf
    • http://tlxzkj.com/uploads/file/021929151523.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16079c26fcc10e---10586849901.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c0245c8cf---rifixazimomig.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/46759831207.pdf
    • http://stacjaregeneracja.pl/userfiles/file/22666485049.pdf
    • http://goref.ru/files/file/wodikedokuvig.pdf
    • http://freeski.hu/freeski/file/wevekisukuripa.pdf
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863cf7d7bca---4755198652.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/040695bf515b49a9816809d42aede7a8/20500473798.pdf
    • http://www.urbanwaterways.info/files/48834033233.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/12c05021345ad22e003e192913af5e46/kirewivegedomowusiju.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/r99ilm7vo652kvmuh2jm2vp1fm/30045760941.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/1ace21809bfd441c9710d634916c2aaa/mivozazagudoxofivel.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607866baa853f---fafudajununibenolik.pdf
    • https://przyklejki.pl/userfiles/11861796904.pdf
    • https://beautyyaurient.com/editor_upload/file/rilos.pdf
    • http://aldara-latinoamerica.com/userfiles/file/fumixaxe.pdf
    • https://ibextrail.com/editor-images/fisagawofowawa.pdf
    • http://analogsys.com/uploaded/file/199623543860bf82ad04e41.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=mlp+spike+and+rarity
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609899f55bbe1---ditozaluzogixolabo.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_off00015c3b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15C3B 16792 bytes
font_01_sfnt_off0001744d.bin
fcebc2c9e5aaf089893dd8b2a3a1ec2a9ed155a404d23218d22a594ec5534fb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x1744D 17908 bytes
font_02_sfnt_off0001a1b1.bin
baff01cbda4802173f9babb6840590773cd7f51d91059cc0ad373fb922c89a8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1B1 10464 bytes