Malicious PDF — malware analysis report

Static analysis result for SHA-256 7735da0911f506a4…

MALICIOUS

PDF

73.8 KB Created: 2021-03-01 00:25:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3a8d757cdbc065669a478d8607875a77 SHA-1: db63d0a16cb67a98aff0c0ee17e23473528c57e6 SHA-256: 7735da0911f506a48b52a259bd5ed72523190a195c513472083696e9377a0db0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with the primary one being `https://botokaw.ru/strik?utm_term=dunkin+donuts+creamer+nutrition+facts`, suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, appears to contain keywords related to the lure. The presence of multiple external links on disposable hosting further supports a malicious intent, likely to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://botokaw.ru/strik?utm_term=dunkin+donuts+creamer+nutrition+facts PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415546/normal_6019c468ac809.pdfIn PDF document text
    • https://zugimawaxudal.weebly.com/uploads/1/3/1/4/131410952/pukavamowezusiju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_6029a80309d68.pdfIn PDF document text
    • https://xetutimi.weebly.com/uploads/1/3/0/9/130968997/japel.pdfIn PDF document text
    • http://lotiruwibek.iblogger.org/super_mario_world_flute_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/siwemawatu/gODichf/nileditusaraligudumonisu.pdfIn PDF document text
    • http://kofodotig.sportsontheweb.net/nezowajokekazivu.pdfIn PDF document text
    • https://zipadufemawosep.weebly.com/uploads/1/3/1/3/131398243/5f9f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373004/normal_5fcb02ffbf9f8.pdfIn PDF document text
    • http://tulakijumipad.22web.org/2018_audi_r8_v10_plus_performance_parts.pdfIn PDF document text
    • http://vabuletarikinil.iblogger.org/weminetapoz.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/blGDMuB/konima.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/how_to_make_a_simple_remote_control_drone_at_home.pdfIn PDF document text
    • http://fataragoreb.myartsonline.com/can_subliminals_damage_your_brain.pdfIn PDF document text
    • http://ludujefu.epizy.com/blitzcrank_adc_guide.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/76311389156.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD3 5200 bytes
SHA-256: ad2e85e1ce48bed5b0f1dae19bfbcd9b6f2dadc7c5a77a0bf2da9e26ed89995a
font_01_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 1796 bytes
SHA-256: 68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6
font_02_sfnt_off0000f4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F9 10784 bytes
SHA-256: 9faac11df7fa436fd388f516e1c32f1feb2b64dba68fcc8830e9a128711edec4

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