Malicious PDF — malware analysis report

Static analysis result for SHA-256 29491df958d5e1b3…

MALICIOUS

PDF

80.6 KB Created: 2021-03-16 06:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c52802118693e9779ee5bb611f22cfae SHA-1: 2aeebd70754b0d5899c45a1c146ee58998ac8739 SHA-256: 29491df958d5e1b38ab8104853ac7127c6397f569e3c29a9265ddb986da34646
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://midufefew.ru/123?utm_term=telecharger+soundcloud+apk+uptodown PDF link annotation
    • http://lemakomude.sportsontheweb.net/54057309318.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/id9hjib/ice_cream_delivery_nyc.pdfIn PDF document text
    • https://vifojozajo.weebly.com/uploads/1/3/1/4/131454549/lepapufukijiwi-fituxeb.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/what_was_the_march_1917_revolution_about.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/67099952578.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447258/normal_602534ffdc22f.pdfIn PDF document text
    • https://rikidunojig.weebly.com/uploads/1/3/4/4/134488605/roxenufoxobux-jogov.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/dobolibasared.pdfIn PDF document text
    • https://cdn.sqhk.co/tabawapizak/fjgjegh/skins_on_netflix.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/ihhhdgi/guess_the_word_emoji.pdfIn PDF document text
    • https://fugagabek.weebly.com/uploads/1/3/1/4/131453631/gedarov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418963/normal_5fc926a151298.pdfIn PDF document text
    • https://mogijoduvide.weebly.com/uploads/1/3/0/8/130814471/junogivoxupize.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/5jexgex/free_piano_hd_pianists.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/42844443247.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e48fce3b-d303-478b-9415-0614b1079cdf/why_is_phillips_curve_downward_sloping.pdfIn PDF document text
    • http://pawepeg.atwebpages.com/67826922842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddb13049-cfcf-4628-bbf9-6c8868f868b3/zorasigovopanuwozulozarop.pdfIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/77475886597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebcf575b-7ded-4a39-94a7-b04fb87c4641/81072236457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ec0bbe-1d34-4c70-9462-063a0630080c/80130716089.pdfIn PDF document text
    • http://nebojemesiwi.atwebpages.com/el_estado_liberal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE56 5440 bytes
SHA-256: 5455c349ea831853d917813c7ddc3e1031f8661f63145b8f76e9af49f51d8784
font_01_sfnt_off000100db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 1964 bytes
SHA-256: 409ee9a3885541ffdc58d6bd2d6bfd260a46de59e4270c8c7780dd2af6cdbafe
font_02_sfnt_off00010a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A34 12760 bytes
SHA-256: e93f9e5454f0bce4badd8cc0b25aa9e78fbb35b4e7a6aa98c6529fcce0de917b