Malicious PDF — malware analysis report

Static analysis result for SHA-256 c14715530b426bf4…

MALICIOUS

PDF

74.3 KB Created: 2021-02-15 20:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ce57cccb88c433f7761400df878f453 SHA-1: 471010c39fb4abf087ff04630b4a823d17b11082 SHA-256: c14715530b426bf4979166bfd86a33b87e5fea4bafde8c28e6c4e527edae0012
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. One of these URLs, 'https://maypoin.ru/wix?keyword=bmx+master+2', is flagged as an external URI. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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=bmx+master+2
    • https://cdn.sqhk.co/lepudijazur/ghhPheZ/marshmello_top_10_songs_2019.pdf
    • https://kegegofelev.weebly.com/uploads/1/3/2/6/132681159/vewajamosumalap.pdf
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/6857b166.pdf
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/fozixofemoxinuminu.pdf
    • https://cdn.sqhk.co/dawafawux/5fp0mex/39812987576.pdf
    • https://cdn.sqhk.co/terasovo/4hghjjd/gajelimuzofusujal.pdf
    • https://wezawelo.weebly.com/uploads/1/3/0/8/130813956/wevexo.pdf
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/ramogusubaxepewik.pdf
    • https://popetufuwude.weebly.com/uploads/1/3/1/4/131483025/69f1f3cd10fa.pdf
    • http://gedagefi.22web.org/assam_rifles_uniform_pic.pdf
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/2831545.pdf
    • https://cdn.sqhk.co/jesupasuzoku/hb02Igj/super_jack_adventure_apk.pdf
    • https://pusiruse.weebly.com/uploads/1/3/4/7/134717846/mabuwu.pdf
    • http://fezomoworiva.22web.org/wokeriwewelimemimafumel.pdf
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/7074731.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jewizopukuni/52415316038.pdf
    • http://sebilazog.rf.gd/wabitenijovi.pdf
    • https://s3.amazonaws.com/tinivukedeta/gawuzewarelomiwat.pdf
    • https://s3.amazonaws.com/wazorixekunafob/beachbody_ultimate_reset_nutrition_guide.pdf
    • http://lujolugajejizog.epizy.com/19547538204.pdf
    • https://s3.amazonaws.com/zifilobesumafi/guardian_2018_chinese_drama.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_off0000dbc7.bin
3028a81d8ee1b164f9d0e0e037834d3f786814a45bcd2e8fca76256df7fe86b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 4572 bytes
font_01_sfnt_off0000eb3d.bin
9894605e5dded5f663e90623c5e7dcc3ffbdc12ece4743e0928d797268b7260d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3D 10184 bytes
font_02_sfnt_off00010e2d.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2D 4324 bytes

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