Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b44188e520126d…

MALICIOUS

PDF

85.0 KB Created: 2021-09-05 04:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8415367a7478938e2124faed7960e301 SHA-1: 1a065c2d59260270e7daeb7bb6b8db5e8b10ddaa SHA-256: 64b44188e520126d77542b8ece4d8bb3b154e27b5de0e887253006948e0cce1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. This pattern is commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/kunapelinujixarudaw.pdf In PDF document text
    • http://erex.hu/upload/file/68233561495.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/f995644a4e09498920ef44a64ebf7ebd/vesemutevopotosebunorit.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/85ab5fe03f8df576d20e2d2a26575030/tenijabawuzoniramofa.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/46412279052.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/pelosawogevukobuku.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/38424004322.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c8a45d870---94787277816.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/b2f174da826cf78a1454bde46b369455/33316116301.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/c4501afb7c5ecc13daa999d9ee8e67df/85562915001.pdfIn PDF document text
    • https://photojet.net/userfiles/file/84144981485.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a70dd779c54---37264275054.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/2136075940.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/tajimokobumazinubajufe.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075a123aca58---sixagibebopibomejedib.pdfIn PDF document text
    • http://ipllaser.in/uploads/87804897934.pdfIn PDF document text
    • http://wallawallahighschool1968.org/clients/75819/File/99316253260.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/ravedobunonusuxigene.pdfIn PDF document text
    • http://worldcar.jp/userfiles/files/53053266281.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/83780229486.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/sulizemosiwoduwawuvixebow.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/tarirewuxawutadilupik.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/jisuko.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a66a57342e2---23059980052.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=cara+resize+pdf+nitroPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 17888 bytes
SHA-256: ffc389ee3fb4fbaced26941e141261ecee1ea44b2ed4d8a827ab38a248ec33b7
font_01_sfnt_off0001166e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1166E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E85 10536 bytes
SHA-256: 4d73d3d9ba3954e33ac69f0ffd21c0871b07889feeb8a479f29883812aab91e7

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