Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e6ff2ef96549c0…

MALICIOUS

PDF

67.5 KB Created: 2021-05-03 00:41:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e258256fb089ee801ec2c943dd71ad93 SHA-1: db4a280b929a1700d039d01f67a3063e6912bf5d SHA-256: c7e6ff2ef96549c0f268845c8e0a8f65fdcc885f5e0c7e17687b0632d257bc7c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file is classified as malicious by multiple engines, including ClamAV and a machine learning model. It contains numerous embedded links pointing to known malicious redirector infrastructure and disposable hosting sites, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains references to 'reizen talking watch' and appears to be a lure to drive traffic to these malicious URLs.

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
  • 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://crophysi.ru/strik?utm_term=how+do+you+set+a+reizen+talking+watch In PDF document text
    • http://cosmosqrab.online/xisazulilavixulex64zqh.pdfIn PDF document text
    • http://kapusta.pro/whats_extended_metaphor_meanrkadi.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/whfgdia/surface_area_of_rectangular_prism_formula_calculator.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391000/normal_5ff89e4519e58.pdfIn PDF document text
    • https://cdn.sqhk.co/daxozazon/heuF04S/lenalubakonuzexamu.pdfIn PDF document text
    • http://fazurusitu.getenjoyment.net/bestiario_mitologico_ilustrado.pdfIn PDF document text
    • https://wisejagu.weebly.com/uploads/1/3/4/8/134881465/7c15edf.pdfIn PDF document text
    • https://betetaguzom.weebly.com/uploads/1/3/2/3/132303315/044bd1a.pdfIn PDF document text
    • http://buyfastedcircle.xyz/musipokuzigodujiruqodmc.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/lg_c9_check_refresh_rate.pdfIn PDF document text
    • http://reduslimitaly.website/71686138692lkb16.pdfIn PDF document text
    • https://lofusomibebez.weebly.com/uploads/1/3/2/7/132740423/569b819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390641/normal_5fdb1ae6bc057.pdfIn PDF document text
    • https://refunijuxi.weebly.com/uploads/1/3/4/7/134748157/8eacc7.pdfIn PDF document text
    • https://vajasefa.weebly.com/uploads/1/3/4/4/134490273/mubarej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488555/normal_6010110ab360c.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/4uji7he/mx_player_pro_android_box.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wobanunep.myartsonline.com/14491423877.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_off0000cb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0F 5472 bytes
SHA-256: 07b1a3d5e7a2dcd01334d73eb8672ec9c70ab3ce3dd4cbcc9468d749f64234af
font_01_sfnt_off0000ddc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC5 10208 bytes
SHA-256: d211aefd8a1b840027207a8098b82467e587eb0dcf57d5395c4233ed57a0e3a0

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