Malicious PDF — malware analysis report

Static analysis result for SHA-256 75088c966d983001…

MALICIOUS

PDF

86.0 KB Created: 2021-04-21 04:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a623cae6f7d6e60a0a61bc5d943dc57f SHA-1: 200b033bfefc2e18908add086c1230aa932aaa01 SHA-256: 75088c966d98300158984b7dba8be8983033a36a8b927b996f214b46621173cf
184 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to public relations campaigns. The presence of multiple disposable hosting domains and link farms indicates a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure and embedded links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=examples+of+bad+public+relations+campaigns In PDF document text
    • https://levixigaroli.weebly.com/uploads/1/3/5/3/135319998/27563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451375/normal_6029da3f81784.pdfIn PDF document text
    • http://1s.london/vazenabuxozafig8wuu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412161/normal_604de5d54fc1e.pdfIn PDF document text
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/63cb65fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_60253017b4f63.pdfIn PDF document text
    • https://dukikabapesudux.weebly.com/uploads/1/3/4/1/134108868/7947141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fd0df4f4f2ed.pdfIn PDF document text
    • https://xiruzavaxukegaf.weebly.com/uploads/1/3/5/3/135324830/ad01d68c37.pdfIn PDF document text
    • http://skout.tech/15761823441roq5q.pdfIn PDF document text
    • https://sonunupenoxomo.weebly.com/uploads/1/3/3/9/133986361/8aa367e4af17aad.pdfIn PDF document text
    • http://dulugidi.iblogger.org/how_to_make_excel_formulas_more_readable.pdfIn PDF document text
    • http://inglassrus.ru/790578082504mwy8.pdfIn PDF document text
    • http://legrand-spb.ru/endless_love_bookqk7hx.pdfIn PDF document text
    • http://sapapubusil.22web.org/96680359445.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/satulibaren/resigaxefefubemejiti.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/50643368146.pdfIn PDF document text
    • http://gugivuma.rf.gd/graphic_design_portfolio_template_indesign_free.pdfIn PDF document text
    • http://nejesinila.epizy.com/47165857599.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/7526894435.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/how_to_get_a_bartending_license_in_indiana.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_off00010f95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F95 5640 bytes
SHA-256: 72a597f78843bba9823f6d446d90ab178496070c5b56effb6e4c9cccfb0ceda5
font_01_sfnt_off000122af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AF 11704 bytes
SHA-256: 5788853610a091810dde0b2f9c86b4285e82a216209918876caece5dc1bc4786

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