Malicious PDF — malware analysis report

Static analysis result for SHA-256 752f5a6157655f96…

MALICIOUS

PDF

81.7 KB Created: 2021-06-13 04:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8ab663e53113246d09908a4a6313b2cb SHA-1: 65562c9dfd549a2947212273253d605935328991 SHA-256: 752f5a6157655f96fea91d4b3223489a28ab9e5399a1b351861fddc3d6afb289
156 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 large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to a URL associated with a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crewmak.ru/pbw?utm_term=levels+with+bubble+wheels+in+bubble+witch+2 PDF link annotation
    • https://xavaruren.weebly.com/uploads/1/3/1/3/131383751/pidetometotipum.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451941/normal_5ff0bb27c5e5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488815/normal_60403cb382681.pdfIn PDF document text
    • https://fosapiluni.weebly.com/uploads/1/3/4/6/134653401/vipanenibetosowosiwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/580172c4-2ec4-4ab1-a21c-5890a8c64ea7/nadivakijawe.pdfIn PDF document text
    • http://sijomirurefi.pbworks.com/w/file/fetch/144451842/tisiterag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90ab2e31-9b97-451d-8cc3-49385a4a70a3/spivak_calculus_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f6217f-bc61-4b79-ab0d-7ff478b536e7/dash_eating_plan_1200_calories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48ba46ec-e49e-43ff-b6f4-e3c9286cbcbc/craftsman_14_inch_electric_chainsaw_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/460a734a-e439-4dd4-8ad6-fbdb20a7254d/how_to_say_thanks_for_good_comments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e2e3af-fd4d-49f6-af67-207d5d9deda5/75372895629.pdfIn PDF document text
    • http://jurekugi.pbworks.com/w/file/fetch/145106238/sujupefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2925d59-5a29-43b4-af58-c66e002bad57/14508164856.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7453d65b-4471-427f-bdea-0751186fa210/what_does_inclusive_mean_in_childcare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2d78ef-0494-436b-bd2d-b80b327346ca/certificate_for_aadhaar_enrolment_update_form_version_2.0.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77639d5d-789c-4fd5-8622-cf9dac22fb24/kafonexavatotuwosuramek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604eb0a0-c77d-461c-a916-70fb9a553f06/why_is_the_aux_not_working.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF612 4720 bytes
SHA-256: 8ae3683bbb01e4b8528d691eb6b5277437c1899ffdabb9e0f1ec05256e41282d
font_01_sfnt_off00010630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10630 11032 bytes
SHA-256: 1b5327f793e3ae662389b73cdddf1c3654e9e096fb152f5a83f1c7e0dee77030
font_02_sfnt_off00012b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B99 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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