Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4a750a937219a0c…

MALICIOUS

PDF

125.8 KB Created: 2021-06-30 23:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 736cdcc1efbc61c7cff8ab2d2af3f649 SHA-1: 10080f109ffa9a166f61c08f283248f808d3eb48 SHA-256: d4a750a937219a0ce6c1a0afa5124c66c93596afd0405b6286d427127abcdfdd
196 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it's a link farm pointing to compromised WordPress uploads and a lure for clipboard command execution. The document's content, though obfuscated, suggests an attempt to trick the user into running commands, likely to download and execute a secondary payload. The presence of multiple URLs hosted on compromised sites further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/685ff87ae46920424091372f49f6c957/momufivifo.pdf In PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b296fb2f022---86929765357.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608421bf60a40---mexagu.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/18108362204.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2a127385---buluvinetu.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/52898772953.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/tomenipunonumesaxixolapeg.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bewijobesopapapa.pdfIn PDF document text
    • http://abpaluso.com/upload/file/banurunimigagize.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdf21dd903---48510706876.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/74c278809485910796e3b67be494887c/womipexiwasidebopojinugol.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/a859d21a87ac8c4acde6be9c877f9f42/remodi.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b00b6e6024---fupamiladudafujexomat.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16085ee62c8b27---nenunupibirogadidul.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a508f45e06d---38253491724.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/j9c57fioerh11832dpdafkv7pr/negifedovimidul.pdfIn PDF document text
    • https://jamurgoreng.net/contents//files/20597916369.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaab75c45e---84459845492.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/43521631519.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/bazowonujekize.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1889ad2dadab0061534d78c29c34b6fb/veviwojorolepukabis.pdfIn PDF document text
    • https://engravestone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac4c7b5016---pobukabivexoz.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/sajimaxilita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=parathyroid+hormone+produced+byPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001a24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A24C 17440 bytes
SHA-256: 7dab141b5d784f586f25c980e96dcb9649bdd3acb0122aa981870a2deb176567
font_02_sfnt_off0001d069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D069 10920 bytes
SHA-256: 47aea0918cda7fa411f4a78d7cb0dc6054ef0446b139a508f500962c240284b1

Open this report in the interactive analyzer, or submit your own file for analysis.