Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0e9f9b0b680cad…

MALICIOUS

PDF

73.0 KB Created: 2021-02-19 20:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9daedf6cd4f0e3932807c64358a8e6b7 SHA-1: 71ae2d3d5f5daa7e937172c32504cb35b48d20a1 SHA-256: 7e0e9f9b0b680cad2fc4ffc25afb93153836f5949aea8495931ba74196cebd77
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting a malicious intent to direct users to potentially harmful sites. The ML classifier and ClamAV detection strongly support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=word+within+the+word+list+39
    • https://cdn.sqhk.co/tuwetebep/ijhidjj/princess_unicorn_running_game_trailer.pdf
    • https://judexibegajojid.weebly.com/uploads/1/3/4/8/134885636/6638010.pdf
    • https://static.s123-cdn-static.com/uploads/4477137/normal_5fed59af1ba25.pdf
    • https://cdn.sqhk.co/bulixanejad/T6lugje/kinalepixiferepibako.pdf
    • https://cdn.sqhk.co/beratinuga/gejaTha/rugomunabemo.pdf
    • https://sowurudiz.weebly.com/uploads/1/3/1/4/131438308/97e53.pdf
    • https://baxemajoxololur.weebly.com/uploads/1/3/1/0/131070692/5843259.pdf
    • https://cdn-cms.f-static.net/uploads/4445115/normal_600fae0729ff2.pdf
    • https://cdn.sqhk.co/sakupiraf/WyjhIGR/mobcandy_app_apkpure.pdf
    • https://cdn.sqhk.co/dufadafakuti/ijeZwjc/my_birthday_party_dream_meaning.pdf
    • https://cdn.sqhk.co/fubemabofof/gghhO5s/ninipipasoseporutinuzo.pdf
    • https://sewigemebovoneb.weebly.com/uploads/1/3/3/9/133997870/pepofajerofa-xovemulosine-rorixonoze.pdf
    • https://cdn.sqhk.co/zogowefu/5I8jcEf/romizufokobudefudilapemi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bamepofewalada/black_fly_song_sheet_music.pdf
    • https://s3.amazonaws.com/wixamupelinere/42182964182.pdf
    • https://s3.amazonaws.com/tarajix/82278307644.pdf
    • https://s3.amazonaws.com/woneketelak/wanewexokupugetejonexego.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_off0000e147.bin
c2e9e24fa9abb48cd2d4cd25ab0f2cb5a4ebc7b38cc523c2695ab6fc2ed850f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 5128 bytes
font_01_sfnt_off0000f2ca.bin
284a1c96d8dd58ab2cc0f8254dea32cffab067c9cf738a63766d24f912402b55
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 10504 bytes