Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e5948be073f772…

MALICIOUS

PDF

80.0 KB Created: 2021-02-19 06:22:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bf8b03ca48095e31eff670081e5be187 SHA-1: f77e8ef7a59a7fbe65925eeb34fcccd7766ffce2 SHA-256: 14e5948be073f7727286abdc7775c1fa8e92609abe388c800fb4b2e2a2b219f3
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable domains and potentially malicious PDFs, indicating a link farm or SEO manipulation tactic. The presence of embedded URLs and the nature of the links suggest it is designed to lure users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://jacksth.ru/wix?keyword=los+se%25C3%25B1ores+del+narco+pdf+mega PDF link annotation
    • https://cdn.sqhk.co/tipefimex/iihpkjg/jajobalonet.pdfIn PDF document text
    • http://comforfemj.fun/23078703721fld9z.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/jhSojgT/zebifoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_5fd6e1d9c9291.pdfIn PDF document text
    • http://findattime.com/introduction_to_electroacoustics_and_audio_amplifier_designdpeuo.pdfIn PDF document text
    • https://cdn.sqhk.co/limiwebu/atheKha/20637850064.pdfIn PDF document text
    • https://zugavalomiseba.weebly.com/uploads/1/3/6/0/136082075/pakegifosom.pdfIn PDF document text
    • https://lopamazaveseku.weebly.com/uploads/1/3/4/6/134643240/lexaxirevezub-zemikefurada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485329/normal_6023f487d1eb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_600d94fcec9ac.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jjgj5hd/poppy_kart_full_version_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bupedamarib/bKhdfhi/15032848233.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/jfijXjd/happy_glass_water_2_draw_lines.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/fiigmii/dosufogaxunadebokaduzotov.pdfIn PDF document text
    • http://mastericy-chistoty.ru/garatapixejugamulufamlfkq2.pdfIn PDF document text
    • http://www.mediafire.cIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liluvad/174723413.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/jopudajofejibibomoj.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_off0000f534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF534 5628 bytes
SHA-256: 6af5c84413c5b0a6e8690390b69cec069a191921af46a58393bffebfdd71333d
font_01_sfnt_off00010802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10802 12748 bytes
SHA-256: 9b1e3efda8d7c1d1b5fc24a12448f1e8dd528fb0da2be338b49c5b11716933c1

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