Malicious PDF — malware analysis report

Static analysis result for SHA-256 e009c589dcba4f6d…

MALICIOUS

PDF

70.2 KB Created: 2021-04-04 11:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 78d1452bed97827fd5526c0e314c6282 SHA-1: c9a3357cae6b6b5d9dce28cc5fa42359ad5d49d2 SHA-256: e009c589dcba4f6de66b9dd5d38beb820bf2a9eda773409cf83bd58ee433c634
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/123?utm_term=ang+huling+el+bimbo+song+free PDF link annotation
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/jifaxo-bifoxuzezi.pdfIn PDF document text
    • https://jonilokakowoso.weebly.com/uploads/1/3/1/4/131453896/pesimixufin-zidotuvat.pdfIn PDF document text
    • https://tupusedaluniji.weebly.com/uploads/1/3/0/7/130738871/1385090.pdfIn PDF document text
    • http://worldthailand.fun/23143279675d80kz.pdfIn PDF document text
    • https://nevitasez.weebly.com/uploads/1/3/4/3/134305442/564daa4d4dfe.pdfIn PDF document text
    • http://galoomer.online/jebudutedczpkl.pdfIn PDF document text
    • http://magnitoli-2ekran.site/casting_defects_and_remediesmgjnc.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/zelurijevuvafaxe.pdfIn PDF document text
    • http://yourcy.com/58345558181lwkzm.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/jojazodaneteb_lirilonuwaju_wevisisikaxug.pdfIn PDF document text
    • http://cleaner360.shop/feng_shui_flying_stars_2021_curesejzty.pdfIn PDF document text
    • https://dukidisivaturan.weebly.com/uploads/1/3/5/3/135311912/8c4fc0e25b4f980.pdfIn PDF document text
    • https://baputopozim.weebly.com/uploads/1/3/5/3/135336161/db1aba51259.pdfIn PDF document text
    • http://filemarker.store/56541454587pmudu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_11930cd065094369b485d66b8e5a06b3.pdf?index=trueIn PDF document text
    • https://12c9c681-cafc-4f88-93da-cb6f471fd49a.filesusr.com/ugd/f09a9d_cc273b6a2140462dbe8c73109fbf37b2.pdf?index=trueIn PDF document text
    • http://kusababi.onlinewebshop.net/tikavatuxod.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_efd7270bede143098981b917d02ffaba.pdf?index=trueIn PDF document text
    • https://2178e3ec-2e0a-46e0-af35-d8a6fdfeb21a.filesusr.com/ugd/c411cf_788b48f2a141427ab0cf5762134cbd5a.pdf?index=trueIn PDF document text
    • http://kaloruligot.onlinewebshop.net/54859279291.pdfIn PDF document text
    • https://47e4df30-8702-49a4-8bd5-327e1546ff06.filesusr.com/ugd/379272_ff2b7285ae4b469ca95527630b1db52d.pdf?index=trueIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A8 4904 bytes
SHA-256: 281cbcfd3935e77a02b24ba383da401cac9d349fbd5789fc50c1c15dce9468c3
font_01_sfnt_off0000d718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD718 11264 bytes
SHA-256: 1fa380a6d012b1ee2e459ed76bc7fe878df0270ace431eaf5a797bf6f2e8a978
font_02_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f