Malicious PDF — malware analysis report

Static analysis result for SHA-256 8826a2acd826100b…

MALICIOUS

PDF

74.8 KB Created: 2021-03-08 12:36:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4e4636fe6ab341cd129b22325854650f SHA-1: 24aacde1f295c3f11ffe60533ce4ba2d06112d14 SHA-256: 8826a2acd826100bc565665937f242ecdf25ea5641c90bd6b5ed4f7fc7b493a4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were extracted, the presence of external links and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/123?utm_term=c%252F+d+stress+canned+feeding+guide PDF link annotation
    • https://cdn.sqhk.co/tolebilu/hh5T2ja/radopuraberafanafer.pdfIn PDF document text
    • https://cdn.sqhk.co/vobilurerire/7jbNcBs/dekirovub.pdfIn PDF document text
    • https://dutebosolet.weebly.com/uploads/1/3/0/9/130969562/mitileludikusus-juzunedimofato-bobexab-suximorudopuk.pdfIn PDF document text
    • https://magagitu.weebly.com/uploads/1/3/5/9/135959352/8e3049279.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/savage_320_field_grade_shotgun_reviews.pdfIn PDF document text
    • http://bodaweziwov.mypressonline.com/15290038082.pdfIn PDF document text
    • https://bifukumuvu.weebly.com/uploads/1/3/5/3/135347201/xadezixiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410190/normal_600c9d05a24f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_600c9dde9be84.pdfIn PDF document text
    • http://numulul.mygamesonline.org/87333847806.pdfIn PDF document text
    • https://cdn.sqhk.co/ximirujusuxo/ldNigJF/cyberpunk_2077_night_city_wallpaper_hd.pdfIn PDF document text
    • http://davofaso.22web.org/beautiful_accident_movie_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379970/normal_6002911fc2880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gegurobaz.myartsonline.com/89207785356.pdfIn PDF document text
    • http://xaposekesudonod.epizy.com/rurobunobarevipesagu.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/classic_wow_leveling_guide_alliance_warlock.pdfIn PDF document text
    • http://tizeruxabono.onlinewebshop.net/nelezorawaropinisur.pdfIn PDF document text
    • http://relulaxalituguw.rf.gd/pewigogotemaziru.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/campaign_flyer_template_word.pdfIn PDF document text
    • http://nedafab.rf.gd/texusidodipiwuxinulokoj.pdfIn PDF document text
    • http://jugejojejaf.epizy.com/16398433564.pdfIn PDF document text
    • http://xumizaxojumiko.epizy.com/90228887769.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_off0000e815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE815 5096 bytes
SHA-256: 9024691e8b06bb530f3626580661206afebb58075dd96ef61329d33c27497d70
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 10680 bytes
SHA-256: ce033d8bcbe74b56dae81c36f11bda552eabc4112596e1e3dbccb744c48d586f

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