Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0a9a75f3738aab…

MALICIOUS

PDF

83.9 KB Created: 2021-06-30 03:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25c475f4ae1fa838c06b4b9b642187c3 SHA-1: 52f83854408e7b02fa9ebf00a36aefa6c11a4344 SHA-256: ba0a9a75f3738aab519116fed4ae60553b93282bda16bb62915a97fc74afefa2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by a machine learning classifier and ClamAV, flagging it as a phishing trojan. It functions as a link farm, containing numerous URLs that point to compromised CMS upload directories. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f43b5203a77bab187f17e967dc069a12/gewepubinajowuvefuba.pdf
    • http://aaaexpressheating.com/userfiles/file/zodajeforu.pdf
    • http://ccswcd.com/userfiles/file/16471616965.pdf
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160871f25ab8c1---83516627995.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/a6095b8eff4d25539ecd99143dcd59ad/daletozofabalubovanajam.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160959dd18b3b4---sezez.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/bofmsqgl8b5kpu1fdnvfqmd1i7/25291067045.pdf
    • https://parkettworld.com/upload/files/xorazujulapale.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b63412b70e---dubezusivaxezegorajurefi.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/0nnjoq5j07o2v2sek3kipqd8iq/gegebezome.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bfd3429d4---pinetum.pdf
    • http://pamat.ro/UserFiles/file/7790695213.pdf
    • http://fzcce.com/aimgs/uload/files/51562875679.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/01000034bb0a98372417ac8759f382f6/zixofupozuxuwibelo.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f55ac89251---42921133763.pdf
    • http://travelport.pl/userfiles//file/42662422651.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609606ac0b3cb---botoja.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160954ff65b228---kiluku.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19c201f9f6---81396619537.pdf
    • http://arablift.net/userfiles/file/5654114573.pdf
    • https://eminencesolutions.in/resources/userfiles/file/4233512528.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b0e20e66d---86741493968.pdf
    • https://rtvpuls.com/ckfinder/userfiles/files/nipukaxapegakam.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=avee+template+free+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_off0000e349.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE349 16792 bytes
font_01_sfnt_off0000fb5b.bin
84703d8983f78792245795169f2cd2c0e5537b35ebfdb31bdc21ba0e73587dad
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 17932 bytes
font_02_sfnt_off00012a8d.bin
a51f5a4f4e55612b0d561dd8c40ad62d90b1414dfb54301b6115fbbf880050b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8D 10532 bytes