Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d87e1cbd6b88ba…

MALICIOUS

PDF

82.2 KB Created: 2021-04-07 16:39:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ddff0af37d9bae801bb29962de35423 SHA-1: 65b200974ecc59df8f756e2435c53e019ca569f9 SHA-256: 85d87e1cbd6b88baa2590c6896278dde13d7fe91cebe57304e42cb9c389d3f61
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL and document body suggest a phishing lure for a 'Gmail dark theme apk', which is a common tactic to trick users into downloading malware. While no scripts were explicitly extracted, the PDF structure and external URI heuristic point towards the potential for malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/123?utm_term=gmail+dark+theme+apk
    • https://rixagebama.weebly.com/uploads/1/3/0/7/130738507/roxuxuwa-towonevodizogod.pdf
    • https://cdn.sqhk.co/bagadogod/bmhaheh/defetuzi.pdf
    • https://cdn.sqhk.co/vasibejovej/fgjhbIW/bideteloligonewojozifapim.pdf
    • https://desagudag.weebly.com/uploads/1/3/4/6/134676200/davajeromato.pdf
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/3386340.pdf
    • https://cdn.sqhk.co/noxomosanena/C1FChaM/bundeslnder_wappen.pdf
    • https://cdn-cms.f-static.net/uploads/4428335/normal_5fda5e5617cd5.pdf
    • https://cdn-cms.f-static.net/uploads/4467589/normal_6052dd99985c3.pdf
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5ffe6040228cc.pdf
    • https://guxofavopadowan.weebly.com/uploads/1/3/5/9/135988616/3995230.pdf
    • https://dunudafulu.weebly.com/uploads/1/3/1/0/131071166/fasixidom_jaditu_jikuriz.pdf
    • http://gigogon.22web.org/chakram_movie_video_song.pdf
    • https://static.s123-cdn-static.com/uploads/4483591/normal_600016e7dfb54.pdf
    • https://cdn-cms.f-static.net/uploads/4465930/normal_606288fe15cdf.pdf
    • http://pewitefu.22web.org/aashto_roadside_design_guide_5th_edition.pdf
    • https://cdn.sqhk.co/mobirewin/MYgckhe/monster_crafts_for_toddlers.pdf
    • https://cdn.sqhk.co/xeliwiwogivo/jhit9lc/sims_freeplay_mod_apk_vip_points_2019.pdf
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fe96251c0ff7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mapureju.epizy.com/43248179315.pdf
    • http://dizojid.rf.gd/income_tax_ordinance_2020_amended_upto_2020.pdf
    • http://fagemefixuf.rf.gd/ll_bean_mastercard_guide_to_benefits.pdf
    • http://niwuzij.rf.gd/32578213609.pdf
    • http://jigugepolega.epizy.com/alumni_singular_or_plural_nouns_worksheets_3rd_grade.pdf
    • http://ridurosumebo.epizy.com/timeline_after_effects_template_free.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_off000103a5.bin
7149c0b4ced6b199f8eee31c57d3c1b27c24a9b2e86f62b5d224bd4db928f4df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 5116 bytes
font_01_sfnt_off000114dc.bin
2c6d719f61833b5ff5ca22cab5bf6d180178b6ffb09283bafc6f3ce15cb5f4cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114DC 11352 bytes

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