Malicious PDF — malware analysis report

Static analysis result for SHA-256 096b99070a9c063a…

MALICIOUS

PDF

77.1 KB Created: 2021-02-17 02:04:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 132c49354c753d8341f443f4ab8b9fdc SHA-1: ab8285ab627fadc3a11871ede37913fd17991cd4 SHA-256: 096b99070a9c063a0281194886616ca6ed5b6bda9cc031f5eee7d4310c09fa2d
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, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely serve to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://druttle.ru/aws?utm_term=how+to+teach+singular+and+plural+to+grade+2 PDF link annotation
    • https://cdn.sqhk.co/sofetarunox/ejjQibH/trailer_star_wars_battlefront_3.pdfIn PDF document text
    • http://kernig.online/40_astaghfarxi8y3.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/chjS6ig/32120819284.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/fojusebo.pdfIn PDF document text
    • https://kabaposirivapej.weebly.com/uploads/1/3/2/6/132680813/perozanibitila-vajuzo-dabezabixe-zugawuj.pdfIn PDF document text
    • https://sasepanubur.weebly.com/uploads/1/3/4/6/134600976/7512722.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/cdU0iZB/28264880141.pdfIn PDF document text
    • https://cdn.sqhk.co/zagekexeroze/gdigjfP/cool_facts_about_human_body.pdfIn PDF document text
    • https://tebadigizowi.weebly.com/uploads/1/3/4/1/134109241/5072595.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/fhd6ifR/buvitikukil.pdfIn PDF document text
    • http://nncucuucuc.space/wesoxinolibajonuto686jy.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/SgdNZje/dulagu.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/ggeRgcP/nascar_mobile_heat_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/NpEhia2/robewisadiduwolofepuj.pdfIn PDF document text
    • https://tonikajolokoge.weebly.com/uploads/1/3/0/8/130874266/8bec95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C1 5404 bytes
SHA-256: a5bea1b183da1842f49e560846e78be257ba7e46a7e50e331c653213987b074c
font_01_sfnt_off0000f41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41F 10840 bytes
SHA-256: 12b30dc97ebc70d35994f172f5a9df66a8caf5cc3bce64120c12140bac0764f8
font_02_sfnt_off0001193d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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