Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2bc8ce570e1c5c…

MALICIOUS

PDF

87.4 KB Created: 2021-07-14 03:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 5ef163340f7b9cba35170bd5d3677fd5 SHA-1: 283d5481da97a022ef3d7fb66d6bda92c71a898c SHA-256: 1c2bc8ce570e1c5c589078d853559590183cf6dd7a84444fe50f5f6e2e157c10
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress upload sites and other potentially malicious domains. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/gm80kh6sgguudc06dfm929nsk6/tajisilirexitonitabewufad.pdf In PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608f460bd3d33---xopobapupuzowuvox.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/93976741868.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b9245d102---nesajazeto.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/md9e2pbpsjt3ju5oihd33r38k5/botofedatalok.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/d108e81174fd5b9b4edc1eb643b47cb6/sobekolusiwopowiwefax.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc6c7e722---1205713471.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210701155654158.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e01cc834efe---92411155196.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd42c8be9b7---73023973553.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/14aa2bd6b58fae77954110384bbafe10/pawigiwibojewo.pdfIn PDF document text
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/04b248f83db2717d5590ef9cc344c711/99013095194.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160920e2fa2186---somijovoriwowi.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/76287406615.pdfIn PDF document text
    • https://szabobuszberles.hu/files/files/rezafaze.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3db9b72bbe---julol.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/6651165378.pdfIn PDF document text
    • http://abnicum.com/files/file/sudatowovov.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160773386b9f4c---91786665649.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/eb1ae83c88200aa29a22ba306d4c6c51/14089715591.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/piridatalosiviz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=traditional+black+panther+tattooPDF 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_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE9 10636 bytes
SHA-256: 55fe7f6deaced93d6edfab4c83ed84c9f8293eb67e4251e609ccf4ce1d40760d
font_02_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 16700 bytes
SHA-256: 898e225c9c5f7078cb83af58bc063e18dc99e5c3ea2dc706c66725392f3d61f5

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