Malicious PDF — malware analysis report

Static analysis result for SHA-256 b210a697c100f656…

MALICIOUS

PDF

98.5 KB Created: 2021-04-01 13:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 522fd2369e8e0c22999fc9f2b9c43acc SHA-1: b676dd69dd0a06ccf33a60813bbcbab31d9c0cfc SHA-256: b210a697c100f65612e2a87e131f9982c0418cad1e1fb39e873e7d2b6c20d816
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a heuristic indicating it's a phishing lure using an image redirector. The embedded URL, https://jacksth.ru/123?utm_term=blasphemy+of+the+holy+spirit+catholic+answers, is identified as a potential phishing site. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest an attempt to trick the user into visiting a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/123?utm_term=blasphemy+of+the+holy+spirit+catholic+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479445/normal_60514830ed958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474170/normal_6059eb1410cf7.pdfIn PDF document text
    • http://tetekegobuj.iblogger.org/gukorixopirekadewifonedi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422386/normal_605ef54ee574b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_6026bb7282a02.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/1717299739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505102/normal_5fe011d6255b6.pdfIn PDF document text
    • http://kemedejovon.getenjoyment.net/xifukoregotitinenamebumaw.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/cf7ba827-8627-4001-bed5-77bc2301f2dc/can_i_control_bose_solo_with_tv_remote.pdfIn PDF document text
    • http://mesozitimilupi.epizy.com/hp_officejet_pro_8100_n811a_printhead_missing_failed_or_incompatible.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa4e8350-c8de-40c8-ae54-73b5291cb519/examples_of_text_structure_4th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7db672c-3299-471a-b088-6b6eae6dd69b/54301009695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360b98d9-1162-4f54-ad0f-a4083cb1571d/58644406432.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66b37368-56fb-47f3-94c7-45579d543f5a/64924210763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4a6b375-1fd1-4d54-9cf4-231cc79d3986/63976150348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65b2186-7369-472e-ac05-3adfad4430b9/xaluwetukavaxavasaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c9b1732-ec4f-4c86-8745-838807ae117a/how_to_change_my_voicemail_on_my_samsung_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bee81f7-5173-4c6a-b74a-7532ca2b2958/41411383353.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95b8e2ba-a094-4fe9-8bf0-81e1ef46146e/xijiwutujovimowilizokojow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/505affae-b478-44b3-aa6c-0a2dab349276/94217840648.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_off0001442d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442D 5496 bytes
SHA-256: f0cb065dd63b3101de7080078af0b7d8905a367927b72e48ab34e22bd840eb06
font_01_sfnt_off000156cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156CF 11080 bytes
SHA-256: 843934b3d1ce851cb7dcacc473e58c4fa95a4e4b679f73e8d341389e9e739985

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