Malicious PDF — malware analysis report

Static analysis result for SHA-256 308ca5d3cd7551a2…

MALICIOUS

PDF

71.9 KB Created: 2021-04-03 16:40:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f3094a878528df660e18108f388f371 SHA-1: cd6080078365ca5567a6537064e33a26e3b19218 SHA-256: 308ca5d3cd7551a2ac2acb02abd1cd28a703f4c169a962c27f7a585648f445c4
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure for downloading content, disguised as a search result for a book. The presence of this URL and the malware detection strongly suggest a phishing or malicious download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://nipisod.ru/wix?keyword=the+happiness+hypothesis+full+pdf+free+download
    • http://potoborotagivud.22web.org/21230113400.pdf
    • https://cdn-cms.f-static.net/uploads/4465006/normal_6035b50823bcc.pdf
    • http://alkostore.xyz/medieval_dynasty_food_storage_not_workingfqc2j.pdf
    • https://cdn-cms.f-static.net/uploads/4471256/normal_60421ef422646.pdf
    • https://cdn-cms.f-static.net/uploads/4411916/normal_6049f4a21de4e.pdf
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5fda845c10fd2.pdf
    • http://wwnews.site/66713452941qunsf.pdf
    • https://cdn.sqhk.co/gevopobi/gijczh9/16441295924.pdf
    • https://cdn-cms.f-static.net/uploads/4446781/normal_6058b5519cbe7.pdf
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fc74beeaae18.pdf
    • http://gonzo-3d.com/38556594554gtdhy.pdf
    • https://static.s123-cdn-static.com/uploads/4462066/normal_6006385fd5122.pdf
    • https://cdn-cms.f-static.net/uploads/4496204/normal_604e643242a7d.pdf
    • https://cdn.sqhk.co/supetudoti/ijjihEM/juretexesapureza.pdf
    • https://cdn.sqhk.co/wimiwupo/phj4Ohc/like_father_like_son_album_review.pdf
    • https://cdn.sqhk.co/kumotuxijufu/deicCQ6/wamirosajerix.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dujabonesisu.rf.gd/18577003804.pdf
    • http://wakodojulugorez.epizy.com/58541345028.pdf
    • https://s3.amazonaws.com/ritoma/alone_movie_songs_pagalworld.pdf
    • http://tisawefe.rf.gd/26379718991.pdf
    • https://s3.amazonaws.com/fajonubinomeder/2767067299.pdf
    • https://s3.amazonaws.com/nakevoja/how_to_check_net_meter_reading.pdf
    • http://suvumudupese.epizy.com/gewako.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d95f.bin
d51ac12266d9885fd73bed5790b55dd739c72a68061347fe505269064cb98923
pdf-font-stream PDF embedded font (sfnt) at offset 0xD95F 5272 bytes
font_01_sfnt_off0000eb60.bin
b1a4ee03a2d996b55bd510cf2ee5813ace9c7dcc835b7cd427646375dfa42c1b
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB60 11184 bytes