Malicious PDF — malware analysis report

Static analysis result for SHA-256 207802adf6a14661…

MALICIOUS

PDF

71.1 KB Created: 2021-09-23 19:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a33203310fb5546a90548b1d50d19494 SHA-1: c9cbf343e02a112b266e23fabf11d2e8a4dc3262 SHA-256: 207802adf6a14661b4ddadb368ca5925e05323580b1938d4d99e68307f9a11d3
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://healthmatters.me/userfiles/file/30511958604.pdf In PDF document text
    • https://ww150007.linebot.net/upfile/files/20210911164311.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210910102827.pdfIn PDF document text
    • http://standardamulet.com/files/files/vufojos.pdfIn PDF document text
    • https://mauspro.net/upload/files/71085208777.pdfIn PDF document text
    • http://sxsasa.org/images_fck/file/1631514040.pdfIn PDF document text
    • https://nada70.org/userfiles/file/pumibipufepuf.pdfIn PDF document text
    • https://dukupahit.com/contents/files/walajibifofa.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/tesugexizewev.pdfIn PDF document text
    • https://toocapen.com/files/22704032085.pdfIn PDF document text
    • https://leresto-niort.fr/images/userfiles/files/xeneruronuzenot.pdfIn PDF document text
    • http://quangcongluc.com/upload/files/bofoxumajoditeti.pdfIn PDF document text
    • https://vieclamday.com/userfiles/file/daxemepaveporop.pdfIn PDF document text
    • http://lso-msm.com/userfiles/file/nomatiweju.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/gefetozukuwokafin.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/tuwetigijujoviwinutu.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/54766364471.pdfIn PDF document text
    • https://paidionresearch.com/userfiles/files/woregejefaxavi.pdfIn PDF document text
    • http://liveranigioielli.it/userfiles/files/25994766022.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/tonikodasetebelojatagol.pdfIn PDF document text
    • https://divetechmarine.com/contents/files/364432074.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/36322995953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=free+movie+download+app+for+android+mobilePDF 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_off0000b4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC2 16708 bytes
SHA-256: 3ca62d45f8345811caaffe1ea30be068015423cbf21750a5022480fb8ca175b5
font_02_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 10660 bytes
SHA-256: 9ff637241e0c324727cac8b0bd46171b6e700f055b629e19c2c65a9eaf859c83

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