Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bb2bbf66035dff…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 17:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e32fa12a1764bca5dcfc7dd45c065f49 SHA-1: 11b150b43e59d9e3805fc91248e6969ad31758ab SHA-256: 46bb2bbf66035dffb06c2e2013c92664bc660413481b79a6c3bc49e0a564de54
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics reveal that the document functions as a link farm, directing users to multiple compromised WordPress upload storage locations and disposable hosting sites. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://ailani.org/wp-content/plugins/super-forms/uploads/php/files/bee189d98396449a2258b2fc9d84f318/27392332937.pdf In PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/topotatupe.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fbb183533e2---79595560164.pdfIn PDF document text
    • https://pnlcoach.com/misc2/file/In PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e54d35d599d7dcd9fea5595c8f3aff23/7150120200.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/7630531459.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee70476851---2411058086.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/b43de9d4deb327707650ad4288cee31c/86000502122.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c714b528ca3ff12191ed1771a44191d0/puxijalebu.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608414324416e---48250201492.pdfIn PDF document text
    • http://fantasymusic.it/userfiles/files/47193660833.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c66ab157595---bajubaloreduzik.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf5feacacbc---4010336669.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e198d1b5---84483569826.pdfIn PDF document text
    • http://crm333.com/documentos/file/54092432734.pdfIn PDF document text
    • http://www.siposferenc.hu/html/8833754401.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610fcafee792b---38387601143.pdfIn PDF document text
    • http://precisao.net/files/files/17630609399.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/61813967301.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/betagegaguxi.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/80027018294.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a328c33c53e---kejotijesefatuvitoxiz.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bd29ae55f---4249688673.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/91339043565.pdfIn PDF document text
    • https://baoyi-chuck.com/ckfinder/userfiles/files/71673611923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=panasonic+bread+making+machine+manualPDF 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_off0000c15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC15C 11052 bytes
SHA-256: 10138c8e1d354703166c4cc15f80d4f39a231eac3de8e98fca251faa09450380
font_01_sfnt_off0000daaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAF 15972 bytes
SHA-256: 17cf70bf04e2e14305fc3404496f9b38d415e293a667928e169968ae7575c38e
font_02_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1