Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9af230f0cce2dcc…

MALICIOUS

PDF

77.1 KB Created: 2021-03-29 03:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 063a7838914bb3bfa0b81bd8b13bc1f3 SHA-1: 6851e5fa4b3a35de6bdea66303d97eed01fc573c SHA-256: b9af230f0cce2dcc7c5b3847ffd77fbbba559b5d865b3d492023c9feea0d8966
96 Risk Score

Malware Insights

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

The sample is a PDF document that contains an embedded URL, identified as a phishing lure related to job opportunities. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI points to a likely attempt to redirect the user to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=social+media+marketing+jobs+entry+level+salary
    • https://pesegoniz.weebly.com/uploads/1/3/4/4/134497823/xijujoruximivib-xugon-begemoko-joxapukutob.pdf
    • https://cdn-cms.f-static.net/uploads/4459787/normal_604e5790b0ab7.pdf
    • https://cdn.sqhk.co/baveninale/ieFjfez/file_manager_app.pdf
    • https://cdn-cms.f-static.net/uploads/4421615/normal_603ffbbccf854.pdf
    • https://static.s123-cdn-static.com/uploads/4384640/normal_600100eeb002b.pdf
    • http://zakosemej.mypressonline.com/lg_front_load_washer_trouble_codes.pdf
    • http://latitekiwa.scienceontheweb.net/administration_internship_interview_questions_and_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4425913/normal_6039ab37ce365.pdf
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/pilamamexitipap-fadetopopixux-raxivanekavuk.pdf
    • https://cdn.sqhk.co/joziroluxu/rgetQUA/latest_nigerian_gospel_songs_june_2020.pdf
    • https://cdn.sqhk.co/jukowejazus/dGjbjjZ/cannon_ball_shooter_toy.pdf
    • http://daludaja.getenjoyment.net/adverbial_phrases_of_frequency.pdf
    • https://cdn-cms.f-static.net/uploads/4379374/normal_60272c8e9aa1a.pdf
    • https://cdn.sqhk.co/lodabazul/jjegihj/1.pdf
    • https://fepafevadaxajaw.weebly.com/uploads/1/3/4/0/134095897/3123e80bf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://faxarase.rf.gd/song_attention_lash_remix.pdf
    • http://lodanije.epizy.com/tefin.pdf
    • http://dasetalolup.epizy.com/public_relations_campaign_book.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e178.bin
287eb6953426d1f212815fdb5b87b8047c6af0443179c83983fe1bdcf2b26bcd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 5592 bytes
font_01_sfnt_off0000f463.bin
d7fa466c10762558df135e4f5caf93d93aa01d19150af29bbebe637736fb2c20
pdf-font-stream PDF embedded font (sfnt) at offset 0xF463 10596 bytes
font_02_sfnt_off000118b5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x118B5 4324 bytes