Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0f0146005df361…

MALICIOUS

PDF

79.3 KB Created: 2021-03-04 01:58:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dce0a5841795c57aa492e99852323fb0 SHA-1: 9803a16383112a463f7ca7f438d5d005176ef7eb SHA-256: be0f0146005df3610e2464f840b5c80e78ceddb2e0333f9c4321891dc3044e03
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm or SEO spam, directing users to various PDF files hosted on external domains. The document body is heavily obfuscated and appears to contain metadata related to its generation, rather than user-readable content.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=proform+performance+300i+treadmill+parts
    • https://static.s123-cdn-static.com/uploads/4481072/normal_5fee54949b379.pdf
    • https://xuvibelatubeni.weebly.com/uploads/1/3/5/3/135306186/vusanab_muwivojuxelelel_zepolejos.pdf
    • https://cdn-cms.f-static.net/uploads/4449789/normal_6012fdfee250a.pdf
    • https://ziresaro.weebly.com/uploads/1/3/4/5/134509830/tepeselodul-sibawodare-pijivefovizag.pdf
    • https://cdn.sqhk.co/zasemewiti/MEghhfb/jenuzuwuvalini.pdf
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/717924.pdf
    • https://static.s123-cdn-static.com/uploads/4381344/normal_5fedf637023c3.pdf
    • http://mopegejeno.22web.org/22130067506.pdf
    • https://tulopudegiwidal.weebly.com/uploads/1/3/0/7/130739196/5079081.pdf
    • https://figusemaf.weebly.com/uploads/1/3/2/6/132682639/soboziwe.pdf
    • https://cdn-cms.f-static.net/uploads/4413243/normal_6035c2f66d1bc.pdf
    • https://kokujefep.weebly.com/uploads/1/3/1/4/131409677/4ed003b4aaaa19.pdf
    • https://cdn-cms.f-static.net/uploads/4408009/normal_601ace5c7f6a0.pdf
    • http://palumurawisan.22web.org/edema_cerebral_vasogenico_tratamiento.pdf
    • https://cdn-cms.f-static.net/uploads/4450628/normal_601296fee10d1.pdf
    • https://static.s123-cdn-static.com/uploads/4413848/normal_5fcea981e89fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xewabilema.epizy.com/how_to_pair_big_blue_live.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee18.bin
9b501bdb3ba820fc00bbefe29dc8af2dd5ada3f0c0daf552b013955df5053fff
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE18 5608 bytes
font_01_sfnt_off00010110.bin
947ee5141d94a3c39898bb69377faa031e272b6a0866764cac1e7817ae3e10ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x10110 14940 bytes