Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8ca7f10dbc0578…

MALICIOUS

PDF

84.3 KB Created: 2021-02-27 06:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 90417f75f5c39ec97059bd8ab1e101dd SHA-1: c654fea93b31da4d7a64043aefa48691edca5637 SHA-256: dd8ca7f10dbc057877055946c2836b366d8c1dcfa7c91ff46be76d195d4f7f09
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a PDF link farm containing numerous external URLs. The ML classifier and ClamAV also identified it as malicious. The embedded URLs and the PDF structure suggest an attempt to redirect users to potentially harmful content or to manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/123?utm_term=ruger+mini+14+tactical+review+youtube PDF link annotation
    • http://xulodol.mygamesonline.org/86808175640.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/7327165774.pdfIn PDF document text
    • http://trikotoria.ru/songs_to_play_on_guitar_with_chords_a_d_e8w4g8.pdfIn PDF document text
    • https://lezanaxowap.weebly.com/uploads/1/3/2/6/132696506/5979363.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/hjjggjg/cleo_mod_gta_san_andreas_2._0.pdfIn PDF document text
    • http://yoptan.space/piwagatowojorolivunafelaflxcxb.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/JjjaFPA/real_followers_pro_apk_old_version.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/clia8gh/90449588987.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/2014_club_cart_lift_kit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/avg_antivirus_pro_2017_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/buboxalomut.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/rapid_notification_blocker_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/belly_dance_tutorial_video.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/fatebupurerumoji.pdfIn PDF document text
    • https://s3.amazonaws.com/rolefosiju/former_cavendish_hotel_felixstowe.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/7544515840.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC0 5484 bytes
SHA-256: 56f2e8bb82471307cb278581eb1619dba5a9ff50a2522a53f46206f79732d12e
font_01_sfnt_off00011d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D7E 11268 bytes
SHA-256: 25f81996081e48097800ef82c216fa70894bb7509da17d8e3f57e5cfc8c7a37d

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