Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c73703268c3946…

MALICIOUS

PDF

81.9 KB Created: 2021-05-05 06:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b996293357fc5d616e9ee6fca6b2687b SHA-1: 2288e9c3ce79600a484bd4db1f952d309a5624f9 SHA-256: 58c73703268c3946f93585418fe7be8c91eb6c9f7edf0c7561369e48872ca60d
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, with heuristics indicating it functions as a link farm and contains external URIs. The embedded URLs suggest a phishing or malware distribution attempt, likely delivered via spearphishing. No scripts were extracted, but the PDF structure itself facilitates redirection.

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://baarspo.ru/strik?utm_term=what+is+change+management+itil+v3 PDF link annotation
    • https://vozokeku.weebly.com/uploads/1/3/1/8/131857213/5185303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_606ea9d75885e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_6041bab33ee4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496585/normal_603e35aa5bd5f.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • https://cdn.sqhk.co/denidugabuni/Jhiicih/sad_love_quotes_images.pdfIn PDF document text
    • http://firstdoctor.xyz/how_to_make_a_micro_bat_boxtv0wd.pdfIn PDF document text
    • https://runejaluzado.weebly.com/uploads/1/3/4/6/134644060/pidapedudipixez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371013/normal_6019036f1ffb0.pdfIn PDF document text
    • https://maverutorolo.weebly.com/uploads/1/3/5/3/135393183/617173.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/iaoOjfu/tegov.pdfIn PDF document text
    • https://nakidero.weebly.com/uploads/1/3/4/5/134524904/kugod-voduzizumetadev-tabovamixu-zunoxazi.pdfIn PDF document text
    • http://rujewazaxijaza.sportsontheweb.net/hashimoto_protocol_wentz.pdfIn PDF document text
    • https://cdn.sqhk.co/surixirulol/jZgvYij/murder_mystery_box_for_families.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujisofivo.onlinewebshop.net/tudivutifotoko.pdfIn PDF document text
    • http://bopisumeku.atwebpages.com/vepusotibagolupopijo.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/powertraveller_mini_g_manual.pdfIn PDF document text
    • https://8b83d164-5e56-46cc-b941-48f48810ddf3.filesusr.com/ugd/76ce43_20664fa9145c4c86b8fe5f11adc51259.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_69a20aaed54e4588903e551e8338ae08.pdf?index=trueIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_9b05d1abbecd4938b38579c443af80df.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_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 5352 bytes
SHA-256: e3f95ee3fbf3b56a3af8624143643511fd39916e0a06b197044f61fe01d95a07
font_01_sfnt_off00011517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 11056 bytes
SHA-256: 9e6c60394a75ade2d79a276d50b5e3c26dac206231a45bb0fd4b3222884ac938

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