Malicious PDF — malware analysis report

Static analysis result for SHA-256 a96ca7af02f24594…

MALICIOUS

PDF

121.7 KB Created: 2021-06-26 12:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 541efa559f1afa37c8dbfd28cb3c7c41 SHA-1: 951778cb37269f9ae7496b588289d84e907a32c9 SHA-256: a96ca7af02f245940a64977c2f29f2a0cd6ec26db0df9b57131c62ca82e025f5
196 Risk Score

Malware Insights

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

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, exhibiting characteristics of a phishing or trojan delivery mechanism. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy and paste content into a command-line interface, a common tactic to trick users into executing malicious commands. The numerous embedded URLs hosted on compromised CMS upload directories suggest an attempt to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d48c587cf1---74855791468.pdf
    • http://mashtalkandil.com/userfiles/file/junamajaveg.pdf
    • http://babamoleskine.com/files/file/7541641301.pdf
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794e8876c2a---vuneduxonizukenuv.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/dvpe9oannefcg4qur7nm42knv1/88673733234.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16093a3b8376ec---xotivaloxibis.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a421cde9f2a---45932814389.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af751835ed---jijomujakovi.pdf
    • https://kartplast.com/resimler/files/rusodizutexejuxiwirakep.pdf
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/8641b6037092a86714caebdb17521582/14748714447.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ad79f048fc3---xokevoti.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/c1f25241cde00b60f3ead1eb6df5d02e/vexawamurur.pdf
    • https://a2designbg.com/userfiles/file/48884501167.pdf
    • http://bhs-class1957.com/clients/35434/File/simenitefatoweme.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160d0cccdd9bba---85221168595.pdf
    • http://cucthongke.vn/userfiles/file///wutekuwelu.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/a299893098eb11d4341659c979cbe29c/bekosalu.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/09686db8df524cf72172b31c857c6160/95556957686.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ptkhicv3j8fh7or8nt55a11sas/94848766450.pdf
    • https://tiguan-wiki.ru/file/zuxejirakumijuwuj.pdf
    • https://acronimocostanzo.com/userfiles/file/jubalu.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/84686161698.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c490f3ee0---jokaverujonobilobab.pdf
    • http://hpworld.hu/data/pic/Image/file/65762943936.pdf
    • https://alakharia.com/public_html/userfiles/file/wofuwelexipaxata.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=command+prompt+all+commands+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_off00017bc0.bin
664cbbe555b36c2c5cdca13f375955302a2a97eebd8f21fc75ee5c127240fadf
pdf-font-stream PDF embedded font (sfnt) at offset 0x17BC0 16728 bytes
font_01_sfnt_off0001a6e2.bin
37f6cf66548eaabdde630b8d2b5681a2c36047c6f7686286f13062b754abeaaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6E2 10588 bytes
font_02_sfnt_off0001bf16.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF16 16792 bytes