Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7cd2a2ecb3d23f5…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 08:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 17234547716b446a9563388744c253a8 SHA-1: cd2582db3f55d3f22270f8ac377a17930f4ce86f SHA-256: f7cd2a2ecb3d23f5d42f169df234166a3a24130c2522ebaedea32ec269b34b9c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the document's primary purpose is to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/123?utm_term=which+of+the+following+is+a+weak+electrolyte+quizlet PDF link annotation
    • http://zanodopowe.sportsontheweb.net/epson_xp_410_how_to_print_without_color_ink.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/dghejg5/spirit_of_faith_family_church_cedar_rapids_ia.pdfIn PDF document text
    • http://logekolumo.22web.org/5322694886.pdfIn PDF document text
    • http://cookwellbakewell.com/doxurosoloaet2o.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/jhdnqjj/46776908574.pdfIn PDF document text
    • http://zimidoj.iblogger.org/thermodynamics_book_in_hindi.pdfIn PDF document text
    • https://zukigepuzena.weebly.com/uploads/1/3/4/5/134593101/f2f38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_5fd79c1910b90.pdfIn PDF document text
    • http://jalifeg.22web.org/hoover_elite_rewind_plus_brush_not_spinning.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/baterai_evod_1100mah.pdfIn PDF document text
    • http://simekavo.22web.org/52548056609.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/total_forgiveness_rt_kendall9fc6q.pdfIn PDF document text
    • http://filanion.online/1745554046v4ntr.pdfIn PDF document text
    • http://hookup671.site/sidepigzqajw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivenoke.onlinewebshop.net/polediwobinumetafuna.pdfIn PDF document text
    • http://rodumotafab.rf.gd/build_apk_react-_native.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_off0000e7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E5 5588 bytes
SHA-256: 18609ba3750f0ba25dac03c4de42e286e10d568cd9d363e23befd3b65207d1e5
font_01_sfnt_off0000fb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB17 11024 bytes
SHA-256: 47babbdce86399fc339774e265bc970acd36c1c7ec71c051bbcbb7a4e1264bc4

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