Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5092894e31cffb…

MALICIOUS

PDF

75.2 KB Created: 2021-01-25 09:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: c4f295db3041292804454435654f1744 SHA-1: d6afe1cd71b20e26be1805535ce663467f36b0c9 SHA-256: 1b5092894e31cffb610577dbfaa6f9c281a080454621cd3d1c3decc378097c86
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 designed to redirect users to potentially malicious sites or phishing pages. The document body, though truncated, contains search terms that likely serve as a lure.

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://baarspo.ru/aws?utm_term=jurassic+park+trumpet+sheet+music+easy PDF link annotation
    • https://cdn.sqhk.co/pijuvedozuw/jfiiPpA/18522593799.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/ifWXOnI/chikki_panday_image.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/920545.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/ieipTW1/mutijasolisojemete.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/he3dhbJ/59883123558.pdfIn PDF document text
    • http://it50life.pro/download_drag_sim_2018_mod_apklb98z.pdfIn PDF document text
    • http://item-mask.top/nedaromh4c47.pdfIn PDF document text
    • https://cdn.sqhk.co/fodumisux/jsmjha9/american_football_conference_south_division.pdfIn PDF document text
    • http://idealica-italiaofficial.site/jifijunotifakotutekj5x7u.pdfIn PDF document text
    • https://fowinojosusine.weebly.com/uploads/1/3/4/4/134495991/1653788.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwaseja/olihhfo/73365823268.pdfIn PDF document text
    • https://cdn.sqhk.co/movijomo/jjigbid/7062020400.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/lunovelevutu.pdfIn PDF document text
    • https://tagopudul.weebly.com/uploads/1/3/5/3/135392217/fagigifine-vegatux-piwojolesota-kenidixo.pdfIn PDF document text
    • https://mivewuwadomabat.weebly.com/uploads/1/3/1/6/131606259/bajevexowavori.pdfIn PDF document text
    • https://senajadodum.weebly.com/uploads/1/3/1/3/131379015/dosexen-kivanekunup.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/d4d6d2d6cf5ea0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/united_airlines_information_telephone_number.pdfIn PDF document text
    • https://s3.amazonaws.com/xalasawu/habibie_ainun_full_movie_ganool.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_off0000e79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79A 5296 bytes
SHA-256: 68416b756dc82b0ce3c5193e4122ee0b99b4a61e802d0e4a5a8269f1141e3ab3
font_01_sfnt_off0000f97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97F 11212 bytes
SHA-256: 29616ae2e17c895fc8c083b159dfc59cdcca47b033cb7bf152a1d1967c8b52cc

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