Malicious PDF — malware analysis report

Static analysis result for SHA-256 be89d60f9e5e5043…

MALICIOUS

PDF

84.6 KB Created: 2021-04-16 02:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f58f28972e7eacdd17a747c7db408216 SHA-1: 30c3738764aa5dd984eeb0ca28f64f06902b01d1 SHA-256: be89d60f9e5e5043dd4ed78d02c72e237707f0f4d83db4c38a9725802ad655a2
186 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. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/strik?utm_term=how+to+take+apart+hp+pavilion+dv6 PDF link annotation
    • https://pigokujedaxe.weebly.com/uploads/1/3/0/7/130740563/nutadivifoga_zepagutawama.pdfIn PDF document text
    • https://gasilarax.weebly.com/uploads/1/3/4/5/134595303/nigekud.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/kideworerur-ruzudexeduritu-fojal-desakezu.pdfIn PDF document text
    • http://xiwasaruv.66ghz.com/cambridge_advanced_expert.pdfIn PDF document text
    • https://bimuxafidiw.weebly.com/uploads/1/3/4/7/134701061/26570491cf.pdfIn PDF document text
    • https://zovijewef.weebly.com/uploads/1/3/4/4/134400079/4980e8acf6.pdfIn PDF document text
    • https://wuvotawek.weebly.com/uploads/1/3/4/8/134872633/ed5911b6615.pdfIn PDF document text
    • https://golajowedobaxa.weebly.com/uploads/1/3/4/3/134308052/aa77f.pdfIn PDF document text
    • http://tegisuro.22web.org/kesuwizufezirofesadud.pdfIn PDF document text
    • http://pumosidefipigo.iblogger.org/zend_avesta_fechner.pdfIn PDF document text
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/fifajesoga-wefemuje-vuzitufeba.pdfIn PDF document text
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/af3a62f7eb412.pdfIn PDF document text
    • http://gepozuj.iblogger.org/liwimunimog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixitomo.rf.gd/pradeep_chemistry_book_class_11_free_download.pdfIn PDF document text
    • http://jegerusomeku.epizy.com/sitemap.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_311319b5579444b38ce32edc711bf0c8.pdf?index=trueIn PDF document text
    • http://bunebuka.rf.gd/21998976008.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/19470194705.pdfIn PDF document text
    • http://pabugevekuxib.rf.gd/43902623131.pdfIn PDF document text
    • https://bdc3fad0-85dd-4e34-85f7-620d54d4ff6f.filesusr.com/ugd/10cedf_a9930e1d80d24fba8d2769f8ec54dd2f.pdf?index=trueIn PDF document text
    • http://ropedeni.epizy.com/editing_pages_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4df9fe43-24a9-4c5e-a18f-70ddc91a6ac7/what_jobs_information_technology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0362de-52e9-4e5d-850e-b44de0e30b41/sat_practice_test_7_answers_and_scoring.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_8a485655adfd439d9261b97a1e8de526.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 5200 bytes
SHA-256: 2c792d89ed7f15ef1d316084f6655ad09a7151567f0e54cfa3a851c09b576e9d
font_01_sfnt_off00011ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDD 11512 bytes
SHA-256: daab8a5c52f1ad66eeb450f16eb32c959b25269b2ac3a2d4203213356b0a83c9