Malicious PDF — malware analysis report

Static analysis result for SHA-256 92aec874d80ccfa1…

MALICIOUS

PDF

75.3 KB Created: 2021-03-15 04:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6603ff24c11017edae4f060c01750cae SHA-1: d4eb547815e1aea62bf8f275f13c0be57d77ac06 SHA-256: 92aec874d80ccfa10b9a782d148464de3546a45f643a10a348c70bd7a94c86f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that points to a URL disguised as a search result for a textbook. This is a common lure for phishing attacks or to direct users to download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://botokaw.ru/wix?keyword=thomas+calculus+early+transcendentals+12th+edition+solutions+pdf
    • https://gabejopow.weebly.com/uploads/1/3/4/5/134597712/padudatularadaviz.pdf
    • http://wogigafulokeme.22web.org/wobixivufanabawi.pdf
    • http://fikepoj.22web.org/korean_reading_book_for_beginners.pdf
    • https://static.s123-cdn-static.com/uploads/4402711/normal_5fc8eb689b468.pdf
    • http://gazozasi.scienceontheweb.net/malipan.pdf
    • https://cdn-cms.f-static.net/uploads/4418570/normal_5fd34f81b6911.pdf
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/zupudotedupaziveje.pdf
    • https://sobexezawatu.weebly.com/uploads/1/3/4/9/134903145/pofifalirolupa-zorofebe-dopasijazodapow-topisu.pdf
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5fd89ea2b4da9.pdf
    • https://static.s123-cdn-static.com/uploads/4417405/normal_5fe57ba788ae2.pdf
    • http://sewowenokep.iblogger.org/sleeping_songs_in_tamil.pdf
    • https://xuxixoxeniti.weebly.com/uploads/1/3/4/5/134585484/247b981c.pdf
    • https://cdn-cms.f-static.net/uploads/4444646/normal_600cab0c243fe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pevogikuxupeja.onlinewebshop.net/was_it_all_a_dream_lyrics.pdf
    • https://s3.amazonaws.com/fukezavazuj/zasinakutevezazukiz.pdf
    • http://pajuxiral.rf.gd/girlfriend_by_bukunmi_oluwasina.pdf
    • https://s3.amazonaws.com/dazovosugev/busefat.pdf
    • https://s3.amazonaws.com/jimugivos/sademekifelobaj.pdf
    • https://uploads.strikinglycdn.com/files/ac78e080-823e-4993-a0ee-1859bbcfbd01/31457461228.pdf
    • http://zokosinetipaw.rf.gd/how_much_is_dish_network_internet_per_month.pdf
    • https://uploads.strikinglycdn.com/files/f6064d25-faaa-4347-b679-6b23330c068c/the_language_of_composition_3rd_edition_teachers_edition.pdf
    • https://s3.amazonaws.com/zatazewoz/captain_marvel_wallpaper_for_android.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_off0000e51d.bin
e5af253c25cefc994bcc667025f6185e0e50f7417772b26d525f7956ebd6e9fc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 5628 bytes
font_01_sfnt_off0000f81d.bin
861c914d4dfa859439a8c04b089f8a21b6d6a81d859f2ef214722aa81245aca7
pdf-font-stream PDF embedded font (sfnt) at offset 0xF81D 11472 bytes