Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3189180809b6ef…

MALICIOUS

PDF

85.8 KB Created: 2021-03-29 18:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38679632ec70c2f53e6a17e712ba8194 SHA-1: 7691d411f6d9bb11c3a34754456da9bd2cc1dfba SHA-256: ce3189180809b6efb2d50cbb6cb79357c00cae410d273d61f00d32ec04284500
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, indicating a potential link farm or distribution point for further malicious content. The primary URL observed is https://maypoin.ru/award?keyword=body+boss+method+nutrition+guide+pdf, which is likely part of a phishing or SEO manipulation scheme.

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=body+boss+method+nutrition+guide+pdf
    • http://gisibud.22web.org/discrete_math_direct_proof_examples.pdf
    • https://cdn-cms.f-static.net/uploads/4456119/normal_5fda959246e85.pdf
    • https://static.s123-cdn-static.com/uploads/4474992/normal_5fe42ab017013.pdf
    • https://cdn.sqhk.co/sofilita/jhcgdid/vaccine_card_template.pdf
    • https://cdn-cms.f-static.net/uploads/4450639/normal_6045fa937e20a.pdf
    • https://cdn.sqhk.co/sawijewabob/gghdgii/78391622188.pdf
    • https://cdn.sqhk.co/wezupobuwab/hBib0rj/98316633093.pdf
    • http://storeplus.info/12_snf_hitabet_kitab_cevaplar4pft6.pdf
    • https://cdn.sqhk.co/kominepoli/SpBcmjc/box_office_records_worldwide_2019.pdf
    • https://static.s123-cdn-static.com/uploads/4488560/normal_5fceeb0740a52.pdf
    • http://zanartcc.net/emil_and_the_detectives_movie_2001ihjqj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xupezewusipoja.rf.gd/calendario_2020_peru_para_imprimir.pdf
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_3e87ce6240714d50b20dc861c8c9decf.pdf?index=true
    • http://xujariju.epizy.com/kibijatusamunebadede.pdf
    • https://a5a8f6e1-24ae-425c-880d-6f4079e3c376.filesusr.com/ugd/035627_b753bfc756e74865ba94fae872cdbc4d.pdf?index=true
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_2306f0c789ef43b1b48967dbe29894cb.pdf?index=true
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_6b1b480e2638441ba921b432a80f45ba.pdf?index=true
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_38d94c30ffd34f8dac5dc1d3049ae0dd.pdf?index=true
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_d08531d9edf7465ca14303ab301ea49e.pdf?index=true
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_25e0bb84262f48c594ef9159c518b5ce.pdf?index=true
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f61d.bin
0bba43c8c198723dba8316cff90906ec561f02229a09fca4a04f2932210f8f22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 5504 bytes
font_01_sfnt_off000108b5.bin
582f7a5df3d92db3a5e350ae5bcd28bbf228d1eb8b8c03a2c893d23bc862bf68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108B5 12456 bytes
font_02_sfnt_off00013359.bin
00c45fe6defe076fe72f4ff40b7df5968e715f2ee0ab71d18781799537436eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13359 16368 bytes

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