Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1acf26ecd56640…

MALICIOUS

PDF

85.4 KB Created: 2021-06-28 07:42:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4fc43ed5b67dcc408961f6ad05a590b1 SHA-1: 9434de8056d72eea01be0c3a4ec64b482718cae4 SHA-256: 1e1acf26ecd56640ce679be401ebd8b82a0290fd0f1d41c1d55b99ee8425f2d1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs users to copy and paste content into a command-line context, a common technique for executing malicious commands. Several URLs point to compromised WordPress sites hosting PDF files, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d772a9a0c---jelageteki.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/9233d8b9aedcb2f562f3ff2cd07cf677/83593701738.pdf
    • http://yogo110.com/userfiles/file/4301691420.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/a5vm5seeds9gpttrm85buc64u3/58027749846.pdf
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/c3fc2b47280214a9c19a0fd73fd1ec23/93540863189.pdf
    • http://rebornfair.com/FileData/ckfinder/files/20210621_7B8D0DB6E89EDBF3.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d28634691---92838026381.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073260cf2850---98232726386.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80a958d4f1---89839091545.pdf
    • https://uleiuri.ro/userfiles/file/kometubizameduleviwejutab.pdf
    • http://4reality.cz/userfiles/files/51738653634.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7419b5d3e---75487147364.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71007d1022---dokev.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b554a9eb9---kadironu.pdf
    • http://hytechplus.com/userfiles/file/36014398965.pdf
    • https://haltia.mx/sii/ckfinder/userfiles/files/fefikijime.pdf
    • http://dansecyr.ca/pdf/file/35360858929.pdf
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/ab4d4bb10ed89d75a983b8f2e5706bd6/35496864215.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/4c412cf446865c5c1b0a87e427049913/72182966066.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/b2f13f761f14b681ed7e197b46006b2d/42323090461.pdf
    • https://cafemocion.com/userfiles/file/74865413378.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/138d93be54654efe01d70762b144d6bb/bekadizutizateralava.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae154968a3c---mipejavonusavajosov.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=best+torrent+site+for+bengali+movie+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA01 16792 bytes
font_01_sfnt_off00010218.bin
dcd1ef58c4fb303ca64db1aa099b5880192fe2fbe28b6a6e875c85e0f394cb07
pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 11040 bytes
font_02_sfnt_off00011bac.bin
23e53f70c6e0b3d9ba0b877d6cb003e09237242cd1ecfae0fbbe1e7cc29996d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAC 17040 bytes