Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c63aa062ae5b380…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 08:42:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6255555255cbf4c1b8fed0e2f3626ed SHA-1: d97fb626419c6e9fcb0a291cbd83fef4e644bf41 SHA-256: 9c63aa062ae5b3804411fbc4dd721507adddd0b771b7a610d55f18cf39562b0c
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URL pointing to a suspicious domain, which is likely used to deliver a malicious payload or phish for credentials. No scripts were extracted, but the presence of embedded URLs and the overall detection profile strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=rwth+mail+outlook+android+einrichten
    • http://najetaxu.mygamesonline.org/how_to_change_bearings_in_a_whirlpool_cabrio_washer.pdf
    • https://cdn-cms.f-static.net/uploads/4491665/normal_5fea2fd54c337.pdf
    • http://tokepubex.getenjoyment.net/who_makes_yard_machine_riding_lawn_mowers.pdf
    • http://mezogevap.mypressonline.com/fogebanixuzusuwigakopi.pdf
    • https://cdn-cms.f-static.net/uploads/4388178/normal_602ed5eec7c73.pdf
    • https://cdn-cms.f-static.net/uploads/4413113/normal_5fdc2ad4cbea6.pdf
    • https://static.s123-cdn-static.com/uploads/4388598/normal_5fe3b04207eb4.pdf
    • https://lemidedimiba.weebly.com/uploads/1/3/0/8/130874299/mixinepoloru.pdf
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/9199305.pdf
    • https://pusexijubod.weebly.com/uploads/1/3/5/2/135296384/xebufane-fegene.pdf
    • https://cdn-cms.f-static.net/uploads/4497095/normal_603ba76b94a7d.pdf
    • http://ganitigusawev.mygamesonline.org/ribejezixuvatamaludovori.pdf
    • http://kekijojovif.sportsontheweb.net/three_branches_of_government_rap_song_lyrics.pdf
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/kemegamigulak-joxujuzonorajot-sobuv-mesuwuxugi.pdf
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/lasugovanuno-pefewixilasop-puregowe.pdf
    • http://vizazovabula.mywebcommunity.org/negoligadumijipixubat.pdf
    • http://rakadan.sportsontheweb.net/what_is_bantu_migration.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/05358d10-123c-4cad-8cb3-936e6dcca27c/38979201114.pdf
    • https://uploads.strikinglycdn.com/files/9d2032d0-1cb6-469d-aa19-d9ac980f3512/love_story_movie_1970_trailer.pdf
    • https://51da6a7d-ee05-4a49-87ee-1b74af3aeb07.filesusr.com/ugd/b80405_706857faa81d4ffe865a9ffe1a7fe7c9.pdf?index=true
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_f2c36e9804b1459291011e3eb3d34f2b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b03ae67a-e59c-48be-8d54-2e0bd1a9bbd9/89857900197.pdf
    • https://b4140449-9b96-4148-8619-c9b3eed7b48c.filesusr.com/ugd/c33cdb_7127b96ee4694cd9bf8b66b7ba6ad96a.pdf?index=true
    • 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_off0001015f.bin
b8148fb7e1b05a1c0b7932a64dc9355ced0d45deb6afdb59a46032bd44926f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1015F 5164 bytes
font_01_sfnt_off000112d3.bin
161af5baaf92ed5fb565ca317ee0192740db808faa096e7fdc44d5e9040979e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x112D3 13160 bytes

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