Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb8102363dc6305…

MALICIOUS

PDF

75.8 KB Created: 2021-03-22 00:05:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: dbda30a06872f0d50e58093dac64880b SHA-1: 9d6226ec29e1fffc4bfe90e294bbf318a52ccd05 SHA-256: 8fb8102363dc6305e89c1caeaaf70e847c88a28cd0d9cba0f24812188bfb27fd
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to the embedded URLs, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wix?keyword=joy+the+baker+pie+crust PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471481/normal_6011abbf62160.pdfIn PDF document text
    • http://keep-travel.com/cuantos_cm_cuadrados_hay_en_un_metro_cuadradonw7sm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_60277ff0f2d74.pdfIn PDF document text
    • http://xazufajemexeb.22web.org/23546116786.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468259/normal_6002b885d23c5.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/viropepelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_601a499ed8f31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491669/normal_5fd7cd9c04a2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486351/normal_601953ced728b.pdfIn PDF document text
    • http://roxelejabojafe.scienceontheweb.net/62707684688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fcc9def95224.pdfIn PDF document text
    • http://medgaj.com/76602697218wr8o0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_600ff40314341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454824/normal_603db8c1676e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_6014dec814160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492555/normal_600dac99728b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_603e54363ee43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5ff3f06d45a4d.pdfIn PDF document text
    • http://gonuzigodu.iblogger.org/90557558779.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/98761462631.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kakoxiji.rf.gd/81871448600.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_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 5284 bytes
SHA-256: 5771a29e50faac9f6c83b6f7c9d27a7050c354fae6dd08f92267824afb3211e8
font_01_sfnt_off0000fc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC97 10560 bytes
SHA-256: ae8e56f63ff124c57d1f114f69b8974bbfe083859633be66c118a3b2f940720a

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