Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd321a05ff8da1b7…

MALICIOUS

PDF

75.9 KB Created: 2021-06-28 05:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3501965d1066366a00b4cb7c23a9166f SHA-1: a334e0f7295f8996e5780b4c089513f0e8fc2da0 SHA-256: dd321a05ff8da1b708a73f5d2e655c545f358cb0391f1ae7cd6108d45b31456c
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous external URIs, including one pointing to a raw IP address and others hosted on compromised CMS uploads, suggesting a phishing or malware distribution scheme. The presence of 'SE_LOLBIN_RUN_COMMAND' heuristic indicates potential execution of commands, though no specific script was extracted to detail this further.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/c59860440977cc75e33d35e96047e6a6/88023369476.pdf
    • http://krikrik.ru/uploads/ckfinder/files/latesogi.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1cf4cc9a---7354010293.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/868t0spf00rnk6im1orn4tso6v/77585201753.pdf
    • http://tscyw.net/userfiles/file/20210615204252_gthp0t.pdf
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/igm8se3feu34l1v9vuqogg5cd6/31981060644.pdf
    • https://fceresources.com/ckfinder/userfiles/files/telimobaz.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/4el2qgu48uhjnkehiq9026hda8/miketoripodeludu.pdf
    • http://157.230.241.115/image/upload/File/15636816057.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0532e5e38d---99600087920.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/ttrnjko6b2pcmi9tksjlpr5747/xusazegagoleburesafebu.pdf
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/79889686824.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e89728549---zapuvul.pdf
    • http://ytbozhuo.com/upload/file/250449154003.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa63b354a9---wetesego.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/c327a9e9246da480b1d466b5b158798f/33257947658.pdf
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/gojiguratitafovomerivo.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/k6udt5cmdk1f58eh0p4s9smgb4/zerogiregeruvenegejarexov.pdf
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087534389c8e---kemivoraxa.pdf
    • http://kiemtoanhaiphong.vn/upload/files/dedekujuvidurifuminesomi.pdf
    • http://cz-synergy.cz/data/file/vekovoworolezefodaf.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160be442e39431---tujova.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe8206156f---27165360000.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=example+of+square+root
    • 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_off0000c6dc.bin
fdfd37baca7196d00197cf7d19cc56d519f504c739037b8e3b690ff803b15371
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DC 10656 bytes
font_01_sfnt_off0000df5a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 16792 bytes
font_02_sfnt_off0000f76c.bin
6969201b30d8da51598428116e208f188619069e602eb8b434cab5a4418f4656
pdf-font-stream PDF embedded font (sfnt) at offset 0xF76C 16580 bytes