Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddf37084d5c36532…

MALICIOUS

PDF

106.4 KB Created: 2021-03-24 20:13:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cc12fe9ec4d35753313c3392b078319 SHA-1: 5c076345bb8ef9bb27d6fd7861ed14859d96ba01 SHA-256: ddf37084d5c365326638038ccd8270654256aa6f363a4f9f32021961ff5f194e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and point to potentially malicious domains, indicating a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malware distribution lure.

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-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/wix?keyword=ttpod+apk+english+version
    • http://appless.space/27224459429ogez7.pdf
    • https://mazefitarunakur.weebly.com/uploads/1/3/1/4/131453858/8eeb373afd.pdf
    • http://loveworld.club/598693801582b5j0.pdf
    • http://kidepokapila.22web.org/eating_animals_jonathan_safran_foer_sparknotes.pdf
    • https://popogupu.weebly.com/uploads/1/3/1/3/131398113/9005249.pdf
    • https://bofejaximolapob.weebly.com/uploads/1/3/4/7/134751884/993970.pdf
    • http://cosmeteca.com/dd_volos_guide_to_monsters_downloadlepnm.pdf
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/finatimuda.pdf
    • http://adminhalil.com/child_s_play_7chrzy.pdf
    • http://tibujodokerijer.22web.org/neon_genesis_evangelion_death_and_rebirth_full_movie_english_sub.pdf
    • https://bejolikide.weebly.com/uploads/1/3/1/4/131437094/dowasunojipuno_ruzubivabapiv_zibepibe.pdf
    • https://lulefimoka.weebly.com/uploads/1/3/2/7/132740328/50151500.pdf
    • http://fruktovik.com/zifigefaloxuzobaskyzuk.pdf
    • https://wefigoga.weebly.com/uploads/1/3/4/0/134041661/8503025.pdf
    • http://dreabling.online/kinivo_btc450_resetyopna.pdf
    • https://govodiroruje.weebly.com/uploads/1/3/0/7/130775462/d2a800.pdf
    • http://artistichomesolutions.com/ff14_class_guide_20190n8ql.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lozinirano.epizy.com/reading_a_weather_map_worksheet_answer_key.pdf
    • http://lamafuravufezin.epizy.com/blender_2._8_eevee_demo.pdf
    • http://kavotipuwevir.epizy.com/greythorn_primary_school_ofsted_report.pdf
    • http://pisatetakedabak.epizy.com/why_writing_a_business_letter_is_important.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_off0000ec30.bin
dd5085708dc4cb76ed14cba30f2e061f4bce8cf9abb7126c75385fd9a0bd1800		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC30 37720 bytes
font_01_sfnt_off00016057.bin
66ac07407bfd83bfa4800457f54e5829d7ac5c0ae288d20929073755c4b90dd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16057 5296 bytes
font_02_sfnt_off0001725b.bin
2f98e0fda10f4d3abbb974c7c89aa9d203f1ae133201bf74dcab60a64a80b00c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1725B 12240 bytes

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