Malicious PDF — malware analysis report

Static analysis result for SHA-256 88569f2c08557e74…

MALICIOUS

PDF

75.0 KB Created: 2021-03-19 03:14:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6cd8dbf64bb30d12ccf052bb197673e8 SHA-1: 76fd14014ab092215107dc2189b692602d4e9bcc SHA-256: 88569f2c08557e741c8726d97621410284f60b4d4e8aa5a0b3730aadf5397ecb
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/award?keyword=banjul+protocol+pdf PDF link annotation
    • http://tapavinologo.mygamesonline.org/45327269419.pdfIn PDF document text
    • https://bufibetotireguk.weebly.com/uploads/1/3/0/7/130739935/bulavunowatefole.pdfIn PDF document text
    • https://cdn.sqhk.co/niporatibu/anghGha/95926504908.pdfIn PDF document text
    • https://dakubazelup.weebly.com/uploads/1/3/1/4/131454222/2399868.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/2982564c5c4d.pdfIn PDF document text
    • https://mitewowepo.weebly.com/uploads/1/3/0/8/130813710/lixopivu_vakopotipole.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/mathematics_notes_class_11_download.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/84561694211ffe3.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/who_invented_the_filament_light_bulb.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/ehePHha/66932247186.pdfIn PDF document text
    • https://jiwosanoxonu.weebly.com/uploads/1/3/5/2/135299962/6789979.pdfIn PDF document text
    • https://cdn.sqhk.co/julukimesof/zkheGia/kick_the_buddy_mod_apk_all_unlocked.pdfIn PDF document text
    • https://momuxubodi.weebly.com/uploads/1/3/1/3/131379397/femofozedidusu.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/bofake/ponujuzinulade.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/airtel_tv_apk_for_mi_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/merchant_of_venice_2004_full_movie_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/castle_bromwich_junior_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/92196455695.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/jozy_altidore_injury_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/58198278405.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/minexi.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_off0000e84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84F 5096 bytes
SHA-256: 3964e35a825a467b1ff19dbd36aa52c655ba77d24a1fbc7e1624f2a34722f8d7
font_01_sfnt_off0000f9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 10936 bytes
SHA-256: d036771df6a873937aec7a52fc54a98791ad6dbd8a0da35b95eca2d7a2cdaa47

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