Malicious PDF — malware analysis report

Static analysis result for SHA-256 71eb69013563b421…

MALICIOUS

PDF

83.9 KB Created: 2021-06-26 00:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b905e9ad4a33eee70537c1fe63e499cf SHA-1: 0de895599064f65bb99aca46ac0a674eb256cd9d SHA-256: 71eb69013563b421ae0940d22f9c79638d17820d4c396d21849ee27981113b39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize WordPress upload vulnerabilities. The presence of these links suggests the document is intended to redirect users to malicious content, likely for phishing or to download further malware. No scripts were extracted, but the overall structure and URL patterns are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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://garglob.ru/uplcv?utm_term=how+many+teaspoons+in+80+ml
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/881bcee6bf177335dea85c75301690e2/bowerejedezefedatarazulup.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31a013550---kimuzitilavi.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082a1e2b2ba0---vopiwif.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082102c73116---vepev.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606d06cf8e378---37333110852.pdf
    • http://wellfoto.cz/pictures/files/lapojumilijefaxuzojuxatar.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/bcmgdlpke83sodqs91cmj4p1q6/jodimogorawezu.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec0eefa8e---95535239836.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c607c59027---xasimapotelatuluxamu.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/2aedeaa663703b55565ba153f81407d0/96220473303.pdf
    • http://3colorjazz.com/fckeditor/userfiles/image/98257854447.pdf
    • http://adabaskimerkezi.com/upload/file/1990798904.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608091e8c2023---varuwinobuletalak.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0d003586d73a7541a3519e100038db9c/gukuwu.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77f8f16cea---31182015541.pdf
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/6kp3a9co4vm5biqgdtlndgpb79/61916763563.pdf
    • http://galluccifaibano.it/userfiles/file/59642676836.pdf
    • http://novussiteyonetimi.com/uploads/file/93847558014.pdf
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b953d8c1645---doxusabusa.pdf
    • http://aptchasers.com/FCKeditor/userfiles/file/37137678940.pdf
    • http://seamcc.com/UserFiles/files/ranosaluziwujupeneter.pdf
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/ff76fa072e95184dbc8efdca49fce92d/745302593.pdf
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/81177c2807767547a8b772a77142582a/91230572380.pdf
    • http://chinoboxingclub.com/clients/36032/File/zuvalatudutufuwetezagop.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd51.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD51 16792 bytes
font_01_sfnt_off0000e568.bin
5f37b39557edcc3c3b142dc3233b0ee9553f508f5a4ce7f1e262fec0c6e3667b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 10832 bytes
font_02_sfnt_off0000fe69.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE69 16252 bytes
font_03_sfnt_off00011445.bin
266a60257780a004ed71d34a5f840270f9e8d8efbf0781855405d2b324f94885		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11445 16840 bytes

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