Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc6fa656d9a12dd…

MALICIOUS

PDF

69.0 KB Created: 2021-01-01 02:14:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c1bb16e1f918141944b30eeaeba2502e SHA-1: 1cbaaf110ce6c1055e6c1322998e6d4cd29ca211 SHA-256: 5dc6fa656d9a12dd3d3077e997f92128855c2858398f6198b73d608f0ba7fadd
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of a URL with 'utm_term=minecraft+horse+colors' indicates a lure to attract users. ClamAV and ML classifiers confirm its malicious nature, identifying it as a phishing trojan.

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://traffnew.ru/123?utm_term=minecraft+horse+colors PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486537/normal_5fb3c4e8ea6b7.pdfIn PDF document text
    • https://pezusadoti.weebly.com/uploads/1/3/4/5/134525395/bowozetal-zixusufozilut-delugu-zifiremo.pdfIn PDF document text
    • https://duboxudufafuboj.weebly.com/uploads/1/3/4/6/134676192/8391041.pdfIn PDF document text
    • https://digafixi.weebly.com/uploads/1/3/0/7/130776371/levobesodex.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://vumiluvitut.weebly.com/uploads/1/3/2/6/132696113/jadibiz.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/c06404e7d290.pdfIn PDF document text
    • https://gibelugexafop.weebly.com/uploads/1/3/4/6/134687098/6b8e5d1a23c0.pdfIn PDF document text
    • https://dafepigog.weebly.com/uploads/1/3/4/6/134605944/ce69569.pdfIn PDF document text
    • https://xilamexazoleguj.weebly.com/uploads/1/3/2/6/132695560/9075297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/80146540112.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD309 4972 bytes
SHA-256: 18a2c497488fae51e05dee568abcdbb7df2b23c549eb56d9f99f77655fe46590
font_01_sfnt_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 10476 bytes
SHA-256: 00ef627aaa13a7bb506dde04ae1406d998f67b4599c119b9d50354de91289bfa

Open this report in the interactive analyzer, or submit your own file for analysis.