Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e664d787b371c1…

MALICIOUS

PDF

195.3 KB Created: 2021-03-17 04:43:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ae5c303bc23eff57dcdde89aa7f4612b SHA-1: 1b43be38f911f606861e3f553b3b13698b9dc281 SHA-256: 74e664d787b371c1cc050286c35d6fb183df2813659979486cb08c9d1d00d785
126 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with a primary focus on directing users to potentially malicious websites disguised as document downloads. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests a tactic of using disposable hosting for link farms, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/award?keyword=history+of+islam+in+subcontinent+pdf PDF link annotation
    • http://suzofovolavuk.scienceontheweb.net/basic_electrical_theory_online_course.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/9380016446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486550/normal_6044a00d556b3.pdfIn PDF document text
    • http://kiparegazeratax.getenjoyment.net/mini_dv_cassette_converter_to_dvd.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/equation_of_a_circle_given_three_points.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422378/normal_601479a5a566a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402721/normal_5ff7e8b500dac.pdfIn PDF document text
    • http://fisitupogavi.mypressonline.com/90641495939.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_e96e1325bf1740989ea498fe09724eac.pdf?index=trueIn PDF document text
    • http://rixibedi.onlinewebshop.net/28606437359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb46c7eb-20ff-431d-ba8c-8f7aec000300/5155156344.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/eragon_2_tamil_dubbed_movie_download_in_isaidub.pdfIn PDF document text
    • http://jefiferinazubim.atwebpages.com/8774293635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b20c2f1-d942-4542-9894-e62b8038da03/bodyweight_bodybuilding_routine.pdfIn PDF document text
    • https://6e8b94c7-278c-4a65-9c30-8d61c93a8f31.filesusr.com/ugd/9ff9b8_13a7f43b0a5f4cdabc553013448960ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/appointment_email_format.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/view_page_source_facebook_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/bitunonubotogejuvigovolux.pdfIn PDF document text
    • http://lojibovel.myartsonline.com/propiedades_curativas_de_la_moringa.pdfIn PDF document text
    • https://ec75ba9f-29a7-4b73-bb51-4c951d20089f.filesusr.com/ugd/17cde0_68d2b881ee66448ea2803d45ab0690fe.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0002d514.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D514 22976 bytes
SHA-256: 3dc228fb352f2480da2087d3239c5aaee030af9ba643c865210b847e8d288927
font_00_sfnt_off000296c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x296C8 5504 bytes
SHA-256: eb8de2a9991c4b0f29bbdac133ed2c721d57778e011f01a04c733b98b7bd8c16
font_01_sfnt_off0002a967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A967 13920 bytes
SHA-256: 94ce614765d749073c466f6c8dbee3369b7a577d0f5f5c2aa62a4daaed2e26af

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