Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9606b16598a8ed3…

MALICIOUS

PDF

90.5 KB Created: 2021-06-25 13:08:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 898915bd8c43aab3a6a8cb10c696edfb SHA-1: 20d46b3ec4939f7226c17ef6c558bf4fb564e5f0 SHA-256: a9606b16598a8ed36a62237969c6c41007afa7b6a6cfbc331cc850aeaf8164f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier returned a high probability of maliciousness. The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. While no scripts were explicitly extracted, the nature of the links and the detection indicate a malicious intent, likely to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/2f2d5f2a993ea337f8a82fa2060b71ba/xofoxo.pdf
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/k96bd3m1gji4kphrsjiij79tj7/86990379975.pdf
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/15675704831.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/mawazisixelifizigebimopaw.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd6ca85e66---nabamagunasopeter.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/18de13546fba0d46450052ea4c625214/48387831857.pdf
    • http://auapp.ch/userfiles/files/wiwas.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e945b788f---84578872468.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ba063d50f30---37122286165.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/938755ff9513e64926650f504d481ceb/defanavatifugobedubugiba.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0f3d4b90c---fesuxazumixusoso.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/k76n065u8fi2t0ouia49lljrh9/pesuxovuz.pdf
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/89004ecb970af355455dbe6508719d8e/49563597671.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/65166574426.pdf
    • https://matrainagycsalados.hu/userfiles/file/sowutumixepubeb.pdf
    • http://autoset66.ru/admin/ckfinder/userfiles/files/wagatal.pdf
    • http://ed-web.cz/userfilesfile/43223154130.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=dokkan+battle+upcoming+events+global
    • 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_off0000fcfe.bin
87faf7d472e42a01ae108ebaa750609e4e9ee17d53bd372fdb9075a1e569adb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 17716 bytes
font_01_sfnt_off00012bbe.bin
5085b98e075f9b28939ffdd74131ea2f51584f264f253b2f81b3575d2f62792f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBE 11016 bytes
font_02_sfnt_off00014530.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14530 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.