Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43009236f0258a7…

MALICIOUS

PDF

79.0 KB Created: 2021-01-08 15:34:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9fe7bce21472dd927cdd647634878bd6 SHA-1: 0ca29d5ff8d20581e25d0206b250ea3ea98a510a SHA-256: b43009236f0258a79f111574dc14bb94cc84be5e445bac7f02f6e65c076df04e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, with the primary URL being 'https://traffnew.ru/aws?utm_term=chattakkari+new+malayalam+movie'. The PDF_SEO_LINK_FARM heuristic indicates the document is designed to host numerous links, likely for SEO manipulation or to distribute malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=chattakkari+new+malayalam+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414498/normal_5f96ee1f61853.pdfIn PDF document text
    • https://zomipawir.weebly.com/uploads/1/3/4/8/134899005/medifubi-ligavatukunatuj-lejedida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_5fae170a36a3c.pdfIn PDF document text
    • https://cdn.sqhk.co/mujekesire/7iahfwu/cross_the_bridge_when_we_get_to_it.pdfIn PDF document text
    • https://maritomumotoko.weebly.com/uploads/1/3/4/5/134512683/wuzizekuziken-guruzexefedasi-wotewir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/killeen_police_blotter_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/chocolate_2005_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/bathilda_bagshot_history_of_magic.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/mominevofopogobed.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/us_dv_lottery_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/taripotemevaxiwipejezuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/gudegogurokateruduvu.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 4972 bytes
SHA-256: c3f81dee4b255cc106c420528f3f92c199d9b13d9a6477b2f6de0c21478e2855
font_01_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 6540 bytes
SHA-256: 892b971efee3ea8e5d8c326f100fa2d9c712784c96598bb45e1fa789434a5d3d
font_02_sfnt_off000108f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F9 11356 bytes
SHA-256: 30e29fae7bfae187efe683a351354eee94303522674b60ccaf5a907606212559

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