Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b61a6064e2005b3…

MALICIOUS

PDF

72.6 KB Created: 2021-03-03 00:54:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7a4488ad3c9dfa567700da4608cb2469 SHA-1: 27b2b55ad363efada98b2387ef49e9a0a4a10585 SHA-256: 3b61a6064e2005b3f6e027e2a46dd8f04f5a33a54de23775b192911f3766a6b5
96 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or phish for credentials. The document body, though heavily obfuscated, appears to be a lure related to a geography quiz, aiming to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=daily+geography+week+24+national+parks+of+utah+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464056/normal_601e01b10d755.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/skyrim_se_vampire_armor_retexture.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_6011281ef17de.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/ha0hchb/sunrise_pet_clinic_tucson_arizona.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ihpgdjc/56735116991.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/x8hevjd/halloween_2020_costumes_couples.pdfIn PDF document text
    • http://tokesuditetu.getenjoyment.net/what_are_the_negative_impact_of_globalisation_in_india.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389095/normal_5ff2646763fef.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/john_deere_4045_parts_list.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_603782bb16555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/jubilate_deo_gabrieli_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/744916246.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/31493659886.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_off0000e02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02F 5640 bytes
SHA-256: f41301b8f498065e3a196030f82ee5ea60e21bf7c96a2f1db453fc7b513b36d6
font_01_sfnt_off0000f38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38C 9888 bytes
SHA-256: 45339175bbe0e384a8a37ad45af2bf46949b1895580be6fe5f7ecf415d8fe12f

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