Malicious PDF — malware analysis report

Static analysis result for SHA-256 246b0f9deefb9ea1…

MALICIOUS

PDF

89.5 KB Created: 2021-07-24 06:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b616746ca4d6859a68ed5ade54b8b244 SHA-1: dab315434bda8bf4d34f18a295a35109906186cb SHA-256: 246b0f9deefb9ea1f45a4f19b80e066a8ce4406a637dd2ea89137043fb7ea341
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests an attempt to redirect users to malicious content or downloads, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf26fd4610---78299317295.pdf
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160afe6e8b60a9---23894141851.pdf
    • https://jerseyshorepirates.com/userfiles/files/91050477266.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d34753860c---poturonijidevowo.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/pjqp5mc8gh8j56both87vv80t8/bezemo.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2a6969d351---71227845099.pdf
    • http://maginsaatmetal.com/resimlerfiles/puvesetagusaduzivevenozu.pdf
    • http://adabaskimerkezi.com/upload/file/funevixawugoxid.pdf
    • http://shelton1961.com/clients/35589/File/13294756159.pdf
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sivefaxepexun.pdf
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/1b0dd553e653c8c2d839468d814b9e0c/godiwufu.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/943fb03099e7fcc8b4b02b7b3997b2f7/nebozu.pdf
    • https://ohcsi.com/ckfinder/userfiles/files/35344041903.pdf
    • http://agcslohian.com/userfiles/file/7478114723.pdf
    • http://budoprojekt.eu/obrazy/file/51384464893.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1aecda2c2---93741051231.pdf
    • http://bsp-oblspl.org/ckfinder/userfiles/files/71894880244.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16070454d75923---22309365296.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/a4064bda074c4cbe8bec8ec0b8b79b29/nepafunosekiparidizuw.pdf
    • http://galluccifaibano.it/userfiles/file/geziwepigowifefiwajo.pdf
    • http://criminisiepartners.it/userfiles/files/kugexamanokirofavowex.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608037f7b1665---47945863597.pdf
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/4167399bb5370fa519473dd1a04fb62b/5703050167.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=the+mummy+full+movie+hindi+dubbed+download+480p
    • 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_off0000f811.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 16792 bytes
font_01_sfnt_off00011023.bin
7b496c4aa8c2dd43a242c3bf10dc932238c800da5bf2a4104ee9ca124f59dd02
pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 17580 bytes
font_02_sfnt_off00013e23.bin
0c3af35657d37194b47630cc238f10437d16b73a37abb647a10471cce6b1fc2b
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E23 11276 bytes