Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e9ee70a2e4a8dd…

MALICIOUS

PDF

80.0 KB Created: 2021-09-06 21:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: f626d60850fe1402b21be2d5419d53e5 SHA-1: 3cee3cac211e28a184f859808b5c43169f0ed85c SHA-256: 29e9ee70a2e4a8dddbb5fa5dbf1e2b90883f0d6cbfc595afbbacf7c6c2f938a1
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to disposable hosting or compromised CMS uploads, suggesting a phishing or malware distribution scheme. The document body was unreadable, but the presence of numerous external links strongly supports the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://presentkompaniet.com/img/content/file/fiwaxomot.pdf In PDF document text
    • http://jingluo.net/uploadfiles/files/kivunoze.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/rukokugul.pdfIn PDF document text
    • https://muahohangnhat.com/app/webroot/uploads/files/lokulagukodiz.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/16390299982.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/7cgov12osjoibgsoel02tih9f4/16064508467.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/jsrv4fcgn2amc3j2tj4cdpvsth/wubojafewejolutuzo.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210820184941.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/43381075007.pdfIn PDF document text
    • http://global-insurance-broker.de/downloads/lulixogamefila.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/96515937833.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/kowenuz.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a4bf46524---91597370495.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/25955623267.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/62609322524.pdfIn PDF document text
    • http://seashoresilverlabradors.com/clients/4/48/482fd9669fb3260065120a60ccac5e48/File/fefegewutepoxosuzevaluw.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/foruvira.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dbf2cb3dc---40892398572.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/loxusireni.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130882d1ac21---wunagizakuk.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/waroram.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/fopilajojureketesakunezis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=cuento+de+la+bella+durmiente+de+los+hermanos+grimm+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE735 19236 bytes
SHA-256: c53c8b63f946abe9f43c8e571735e243f49407a42f3800181adeda4257a0e662
font_02_sfnt_off00011810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11810 11216 bytes
SHA-256: b37aa4a59cdb9a9b75230adadfb10908ff597a94b55d8767df36d4f78c443511

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