Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ddf46de39a0e12…

MALICIOUS

PDF

67.8 KB Created: 2021-03-06 12:38:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ae8a034c3c8796fc7e3093b3af0e59af SHA-1: 9625984d4fc7da0de4abb4167a086ad93377e81a SHA-256: f9ddf46de39a0e12243bf0defe4cb56dae082a1bebada3ff5122896305abb8f1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The primary URL, https://kuzutuzo.ru/aws?utm_term=evenflo+pivot+infant+car+seat+base, is likely part of this scheme to drive traffic to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/aws?utm_term=evenflo+pivot+infant+car+seat+base PDF link annotation
    • https://cdn.sqhk.co/gujowaxexag/dIv7Ijd/79585193785.pdfIn PDF document text
    • https://nosodelutota.weebly.com/uploads/1/3/1/8/131857544/sikekaxinuxugivesaki.pdfIn PDF document text
    • https://cdn.sqhk.co/nefukale/iW1iuGK/17383808932.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5ff419edbd2cf.pdfIn PDF document text
    • https://wogizirimabote.weebly.com/uploads/1/3/5/3/135337148/4707079.pdfIn PDF document text
    • https://jifonoru.weebly.com/uploads/1/3/5/3/135316211/banevarosi-wubebe-rabij.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/1jbnuic/gupesaziwoge.pdfIn PDF document text
    • https://benodamefeju.weebly.com/uploads/1/3/5/3/135346815/7458659.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/kzOdghc/pubujavuxitofajoruv.pdfIn PDF document text
    • https://cdn.sqhk.co/limizolaxa/fqTD3gd/multicraft_panel_commands.pdfIn PDF document text
    • https://witaretazijaw.weebly.com/uploads/1/3/0/8/130813730/3980759.pdfIn PDF document text
    • https://zijobezugol.weebly.com/uploads/1/3/2/6/132682913/3133477.pdfIn PDF document text
    • https://cdn.sqhk.co/vumorumuvogi/ijghjhH/how_to_make_carrot_cake_youtube.pdfIn PDF document text
    • https://pufopobumosuv.weebly.com/uploads/1/3/0/7/130776602/wobariwotofitopo.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvotalek/I0Qicja/color_splash_pool_light_12v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406229/normal_5fe352855f405.pdfIn PDF document text
    • https://gesaseli.weebly.com/uploads/1/3/1/3/131379828/1247648.pdfIn PDF document text
    • https://cdn.sqhk.co/mitugejaxel/jaieWU9/31541295655.pdfIn PDF document text
    • https://botosedasirewen.weebly.com/uploads/1/3/5/9/135961685/gubuwilegenubojifes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495393/normal_5fc7f0ec34fab.pdfIn PDF document text
    • https://sosedegif.weebly.com/uploads/1/3/2/8/132815053/1529494.pdfIn PDF document text
    • https://wemogejivaje.weebly.com/uploads/1/3/1/0/131070934/sekosifedunatab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ce1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1D 5164 bytes
SHA-256: bcaf1e5019170421c303e6d9b8986ab0f8dbf03ac9e879bd76223b6c210e17c2
font_01_sfnt_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 9932 bytes
SHA-256: 0d28593a8fc1390fd130954591726acb597d63c480ed9e3050c2a1a65c9a7ad5