Malicious PDF — malware analysis report

Static analysis result for SHA-256 6620d93d509572fe…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 01:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5dc2d6e1f7e6a1dd35a852d0a2af4c02 SHA-1: cea4bc11e1e68cbb0d16b8a872e245a2dc9ac871 SHA-256: 6620d93d509572fec35eff6a1c854361ca5d5a5acc44b9e7007e9becee7b14b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF link farm heuristics further supports this, indicating the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ssatripoli.org/userfiles/file/91871189406.pdf In PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/faq996892u5vbq9d0o1qgjd7b4/wefigevumuxumumabimepuma.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/guxoje.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/5fiis27c17434mu2tvlak1mmfl/7290573439.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/mipodigemu.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/tonokuwapozu.pdfIn PDF document text
    • https://muacash.com/webroot/img/files/1529030309.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-2/20210502181544623242.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/52830276319.pdfIn PDF document text
    • https://kalitelivideoizle.com/resimler/files/18624452174.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e39509bef51---boseramu.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/37170407493.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/n3g0dq1epjkpp4qnl7a2b7c1m2/69757949168.pdfIn PDF document text
    • http://helder-effect.nl/userfiles/file/4474644682.pdfIn PDF document text
    • http://mcutech.net/files/42451792828.pdfIn PDF document text
    • http://short-story.ru/upload/file/veseduwetopusepefosetewe.pdfIn PDF document text
    • http://ncdesign.it/userfiles/files/59514646082.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/v2p5q248rl9117r098ggj65e2t/pefetevawazabesi.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/mivugarunevajegikapesupo.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/bulaped.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161271e43dfc8c---tigufidavinobuvagaxi.pdfIn PDF document text
    • http://www.pics4us.de/userfiles/file/50427953148.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=manual+del+usuario+seat+ibiza+2012PDF 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_off0000e27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE27A 18796 bytes
SHA-256: 69fde5145e7524cd8a980f1c1e9ac1917d577d47a35c638eb8e64e07c27eb0f9
font_01_sfnt_off00011386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11386 10828 bytes
SHA-256: 0bd6d863a81c11bc6f850f87e3fcb8c1c5fe21313f92dc42dcf3d1cfd63c814c
font_02_sfnt_off00012cb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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