Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfeaf0d6528b34c5…

MALICIOUS

PDF

88.7 KB Created: 2021-09-07 06:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7414b6c361d06c5216484dd17c14e7a4 SHA-1: 03645b9441e4c9852ae63c5cc90916e6ed8af8bb SHA-256: dfeaf0d6528b34c5f866fc057d17f02ac66879f3f3e69875f01c74601ddc0e0b
164 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links to compromised websites and a deceptive download button, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://aduanaldelvalle.com/userfiles/file/rozedudukowirokul.pdf In PDF document text
    • http://wsp.pl/userfiles/file/14899130663.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/29383723112.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/sefokixevakigum.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff921949dd---gasubula.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/312f07b8427661d3f2fc561ee671a9e9/pijakojademozizis.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085694f69889---52627190141.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/bolusasagipexinuxiz.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/vunikonokufutesidirun.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/gaveg.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/58630593237.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/27957460308.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/rudan.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/94547685565.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec67d69084---pazoxajibujekakudire.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078be9b758f3---17607440352.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/bewokuduxubijowupi.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/9733640616.pdfIn PDF document text
    • http://unitez.net/images/newtech/files/wesolewo.pdfIn PDF document text
    • https://dintek.eu/uploads/file/gavof.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/nhqsojv7cq2tvds0cjllt4h6h7/laruxepizurufibunuxabi.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/kexatagofobaxexotesivef.pdfIn PDF document text
    • http://cserepakcio.hu/xdata/file/81297215173.pdfIn PDF document text
    • https://nslogisticservice.com/userfiles/files/fafukexuwij.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/5pluoj5g5qee5vm4dtda4a0730/xenaritevote.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=sketchup+architecture+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_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 18008 bytes
SHA-256: 52e958a42c37805d4747f4fbc97cbce229cb7fbbb1be76f93d0df8538de13542
font_01_sfnt_off00012493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12493 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAA 10544 bytes
SHA-256: 0abc8674076b33b65c3bc1a95d5b2752fe7556a9ad821ac45cb0c53cce13f574

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