Malicious PDF — malware analysis report

Static analysis result for SHA-256 fee0ee4a081faea6…

MALICIOUS

PDF

74.7 KB Created: 2021-02-03 02:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a9f70d9eec42c1810cdd92a60377093 SHA-1: d2872e052f4d166a70ccc1e8fd701657d556fd60 SHA-256: fee0ee4a081faea67257f8a564e0dd27feb796eb08f1f831e16e34055f226fb0
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 by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on multiple domains. This behavior is indicative of a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier further support the malicious nature of this file.

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://druttle.ru/aws?utm_term=marriage+album+telugu+songs+free
    • http://varistop.site/godaganikarefogukermw67.pdf
    • https://cdn.sqhk.co/tudifemumopi/giaMUgc/59567024292.pdf
    • http://voiprormul.xyz/vosazotepexezogideziv6l90b.pdf
    • https://cdn.sqhk.co/lezubenewago/XW3jhgi/diy_mask_no_sew_sock.pdf
    • https://cdn.sqhk.co/makafabakuna/gLMifGy/othello_sparknotes_translation.pdf
    • https://bikugepoxo.weebly.com/uploads/1/3/5/3/135351236/059b558a2eca6c.pdf
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/4bcd07a7f25d176.pdf
    • https://zumugewij.weebly.com/uploads/1/3/1/4/131483128/gidovuf.pdf
    • http://legalvictory.group/satisfying_slime_videos_before_bedx6sje.pdf
    • https://cdn.sqhk.co/pedidagow/h4G0gdi/jipem.pdf
    • https://cdn.sqhk.co/mugejufunij/V9jd7ib/lg_xboom_rk7.pdf
    • https://buvekidi.weebly.com/uploads/1/3/0/7/130775196/pomegobadunom.pdf
    • https://cdn-cms.f-static.net/uploads/4469860/normal_5fdba777723e2.pdf
    • http://helplnstagramcontact6088756.com/how_to_install_racemenu_for_sse6sm09.pdf
    • https://lozezuxugi.weebly.com/uploads/1/3/4/0/134016676/vemedagawiwof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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_off0000d9b6.bin
7ccacb4a9cf680a4a2b6497def5dacd6e6e0972fcda65ed18814f73eedcebb16
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 5112 bytes
font_01_sfnt_off0000eb05.bin
05408b3ebbd3c17d88d8e2bf71b62eeb89f79ae257604ff0291be69a264087a0
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 10732 bytes
font_02_sfnt_off00010f88.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F88 4324 bytes