Malicious PDF — malware analysis report

Static analysis result for SHA-256 db16252537296b88…

MALICIOUS

PDF

79.1 KB Created: 2021-03-03 19:20:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0bca4c330385ca201f2ca1520f2e993a SHA-1: 2f76ea4069d0b6c5c5f49bebbe0211f64b95fb29 SHA-256: db16252537296b8849f73f2865767ca0730f3db92509e9720b4f2134b4e50fdf
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting it is part of an SEO spam or phishing campaign. The document body, though partially corrupted, contains a title related to HP ink system failure, likely intended to attract clicks. No scripts were extracted, but the extensive link farm points to a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://mezovuduw.ru/wb?keyword=how%20do%20i%20fix%20hp%20ink%20system%20failure PDF link annotation
    • http://soinjaga.ru/tepetelinosazihc5ge.pdfIn PDF document text
    • https://xuxefakeni.weebly.com/uploads/1/3/4/2/134234722/3757561.pdfIn PDF document text
    • https://najoduvojubowi.weebly.com/uploads/1/3/2/8/132815002/95f556f8256cb.pdfIn PDF document text
    • https://gurawibozogudex.weebly.com/uploads/1/3/0/7/130739732/622553.pdfIn PDF document text
    • https://rumarefux.weebly.com/uploads/1/3/1/0/131070750/4225416.pdfIn PDF document text
    • http://gajonedorebuko.mywebcommunity.org/engineering_drawing_tools_price_in_sri_lanka.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/8867604.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/jemebogewomoju_getodokukus_ruxefugavodij.pdfIn PDF document text
    • http://rolopigabetitu.scienceontheweb.net/triumph_bonneville_service_costs.pdfIn PDF document text
    • http://omoikiri.info/tulodivarbw7zl.pdfIn PDF document text
    • http://fastgetme.online/add_text_to_mac_preview0kkak.pdfIn PDF document text
    • http://vorgazme.com/rocketfish_wireless_speaker_kit_manual8pwuv.pdfIn PDF document text
    • https://nobasaxekomu.weebly.com/uploads/1/3/5/3/135322761/tulitilubozikor.pdfIn PDF document text
    • http://reassurez-moi-fr.info/tumivipativosliy95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kubowulurarekij.myartsonline.com/lg_8000_btu_portable_air_conditioner_manual.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_off0000f7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7BA 5568 bytes
SHA-256: 62bfa82467ee96752863267ee7c8cac404598db0de1ecc18b0c9dd079944023c
font_01_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 10844 bytes
SHA-256: 73b53bc7be1645b0cf4d825fb358231272882e14cc743d7aa8d325870efc2a5a

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