Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1c6663492f1651…

MALICIOUS

PDF

75.4 KB Created: 2021-03-08 11:10:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cca6a9b3eb64b8ae3c1ca2609b963708 SHA-1: 8667e1fe1631d240ee8e3902df5ea2b7e1dc4bc2 SHA-256: de1c6663492f1651411b4c21efca16bfcdb2d79567a95629aaaa65dcd18a7f3d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, likely serving as a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=speed+and+velocity+calculation+worksheet PDF link annotation
    • http://buytoday.cc/755980445528heu3.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/carbs_in_taco_bell_soft_taco_no_shell.pdfIn PDF document text
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/9335497.pdfIn PDF document text
    • https://vewevemeza.weebly.com/uploads/1/3/2/7/132741136/a7e4d1ac1f16.pdfIn PDF document text
    • http://waferaboteb.mypressonline.com/what_is_an_example_of_scientific_literacy.pdfIn PDF document text
    • http://gumidaz.medianewsonline.com/does_td_ameritrade_have_penny_stocks.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5fe7a95896b7b.pdfIn PDF document text
    • http://on-arenas.com/words_to_describe_something_rainbow5l7kd.pdfIn PDF document text
    • https://repositugi.weebly.com/uploads/1/3/0/7/130738607/f975b131.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/nixiwojojamatudaxamev2hv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_6012885b66f92.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417208/normal_5fcc5e9334c9e.pdfIn PDF document text
    • http://dizofuses.mypressonline.com/act_practice_test_free.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/fukedameju.pdfIn PDF document text
    • http://rubka.space/le_livre_des_secrets_oshol768o.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/jizewibotatutobuket.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_600fabb3e385f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fumibomi.epizy.com/bum_bum_bole_song_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d1f888e-77d6-49d6-b7bd-3c9d1140f480/pujugimuzijetumijovemubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d63119c-e866-472b-bf1e-a6ebcc052fe0/85620696117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5857d4f6-46ba-4487-bfb7-a48f2d485de8/sunbeam_sqh310_specs.pdfIn PDF document text
    • http://deweget.rf.gd/nupipexanumokabi.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0A 5584 bytes
SHA-256: 99def558165bf2fe7099d2fa9ff9a822214992fde2367a1f3ebe4e2c120c536d
font_01_sfnt_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 10212 bytes
SHA-256: 0b4c870bf15349d2f515995b68aeba3ceeefb511c5abf435cc8b1952cc91ea02

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