Malicious PDF — malware analysis report

Static analysis result for SHA-256 b053037195951ccf…

MALICIOUS

PDF

76.0 KB Created: 2021-01-04 18:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 576d246c78b66d063444ef109b741d5c SHA-1: d1a424fa7c8b5875a4470d883447e10f92959b40 SHA-256: b053037195951ccff0988a4f9de6b86829ff1dc7c3f9b5447ae1eb87c01fa7e7
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded URLs likely serve as lures for phishing attacks or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafficel.ru/aws?utm_term=anonymously+report+a+drunk+driver PDF link annotation
    • https://cdn.sqhk.co/tewisifupib/iaWbFhf/flashlight_off_on_iphone_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479921/normal_5fdf35c4d4a81.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/bajodekunafox-fopofulapelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385206/normal_5fb4e27d2a224.pdfIn PDF document text
    • https://pekubitox.weebly.com/uploads/1/3/4/4/134477952/1b493d5eb3.pdfIn PDF document text
    • https://kevegojap.weebly.com/uploads/1/3/4/8/134863313/c0063b41a0b06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490366/normal_5fcb35e00bf43.pdfIn PDF document text
    • https://cdn.sqhk.co/samigimas/hegdWFZ/45522010118.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/731404.pdfIn PDF document text
    • https://dapevorejux.weebly.com/uploads/1/3/4/6/134695165/bosenureg-wapagesef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_5f914d40b5a4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5f96d3b873c59.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/fanibejotiwuratifi.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/torajisol-miravetewiluput-wovugejeg-fedawu.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
    • 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_off0000df1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1F 5200 bytes
SHA-256: 5a9f0bf16b2e6fd1e27c59ed1c76d9bbd3efc6dd35b3701c67c340bae3925ba8
font_01_sfnt_off0000f0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BC 10504 bytes
SHA-256: 1e3d312f5b116b0df7a92a8f0c76b7939b68f0c1268daf8b2836519a80c373bd
font_02_sfnt_off000114ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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