Malicious PDF — malware analysis report

Static analysis result for SHA-256 f54c9daa06e38aac…

MALICIOUS

PDF

84.6 KB Created: 2021-09-02 17:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 089f3e66961a3eb7b8a11bd3f75566af SHA-1: 6e9e66962294fbd78134019ee90c183aa1928318 SHA-256: f54c9daa06e38aac0bc66448ac2411ade4a484e27230d839f05f6f512ef64ed8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://irlanc.ru/uplcv?utm_term=comment+convertir+un+document+pdf+anglais+en+francais
    • http://domeinbeverdonk.be/assets/files/file/33813430246.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/f677c5ec577d18b185d10ed6fc4c38e4/letuguzibununupotaje.pdf
    • https://autotrans911.com/thread/admin/uploads/file/31576653526.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fa4ac485d---66227688968.pdf
    • http://hiace-yoshikawa.com/js/upload/files/72622885040.pdf
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/160a691c89e8bd---26680798117.pdf
    • http://ipceurope.eu/assets/file/rimoxarisu.pdf
    • http://merlegdoktor.hu/tmp/82642841745.pdf
    • http://bluestandard.pl/ckfinder/userfiles/files/koniweref.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160929309c886c---37316116192.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/0a81afda2d552263bb118d119fa70218/90074025873.pdf
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e82baea19b1---5756800862.pdf
    • https://zlataraburmevuckovic.com/files/32472131492.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/heejgs1s0a14dm8iu3k5idra2a/44545392650.pdf
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/2c73c3836e8124a6c40c17ee542eaa24/fusoresategudoxa.pdf
    • http://thamdinhgiadaiquang.com/img/files/78122408579.pdf
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/depuvotuxebazowofe.pdf
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f478598c0---4625625204.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611463997ae9c---dogisebizegomafiwepelox.pdf
    • http://jumpstart.mobi/ckfinder/userfiles/files/26317177856.pdf
    • http://blackhorsesc.pl/userfiles/file/nefuxefosupejovejavudip.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/vuwefikukejogirik.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609744718f71e---jajafewodase.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_off0000de4d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4D 16792 bytes
font_01_sfnt_off0000f65f.bin
91835cf0febdce401c49c782e4bd79c383fe581e9b06150090e25c84a48e435e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 20404 bytes
font_02_sfnt_off00012a07.bin
21eb6195648a4bf7335f53a09f0cee0315290ff232ec035203cc4abeafd0720c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A07 11160 bytes