Malicious PDF — malware analysis report

Static analysis result for SHA-256 220754bcd82f252a…

MALICIOUS

PDF

77.1 KB Created: 2021-03-28 16:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 74622a8769f3ebad90c16e006412e52c SHA-1: cc509bad6fd04e6092c9afac5d40067089f830ba SHA-256: 220754bcd82f252a5fb741b47f4d915994084176aec88dbd452b771bb9d5e265
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links pointing to various domains, many of which are hosted on disposable or suspicious platforms, indicating a link farm or SEO manipulation tactic. The presence of embedded URLs and the nature of the heuristics suggest the document's primary purpose is to redirect users to these external sites, potentially for phishing or malware distribution.

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://lozipotod.ru/123?utm_term=deformasi+batuan+adalah PDF link annotation
    • https://zeregosuw.weebly.com/uploads/1/3/6/0/136055393/tiwejaluj_nazasugikomaram_wofafosuwixoga_dozalubosunip.pdfIn PDF document text
    • https://funofumid.weebly.com/uploads/1/3/4/8/134886651/fokekutepibor.pdfIn PDF document text
    • https://mazokaru.weebly.com/uploads/1/3/5/3/135303974/4645961.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/kiruv_gemutas_xageboxewivusu.pdfIn PDF document text
    • https://litazivufili.weebly.com/uploads/1/3/4/3/134305244/nijaji.pdfIn PDF document text
    • https://cdn.sqhk.co/zomidami/3qkWmif/82398747733.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/xyhfjp0/espn_nfl_scores_steelers.pdfIn PDF document text
    • https://lupemofuxuxutuj.weebly.com/uploads/1/3/1/3/131383332/kerapagigapet.pdfIn PDF document text
    • http://vadanunagirira.getenjoyment.net/phylum_porifera.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/daca9877d9119.pdfIn PDF document text
    • https://xadajosawot.weebly.com/uploads/1/3/1/6/131636584/fumunawoligo_kowovetilojud.pdfIn PDF document text
    • http://sunugukumota.getenjoyment.net/2020_liturgical_desk_calendar_catholic.pdfIn PDF document text
    • http://ranupila.mywebcommunity.org/87849652398.pdfIn PDF document text
    • http://goodsfor.life/2005_cadillac_cts_vecftw.pdfIn PDF document text
    • http://naturapple.space/39363502899muv4f.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/debamijizozexo/free_romantic_book_downloads_for_kindle.pdfIn PDF document text
    • http://logiweliziweje.onlinewebshop.net/25862695746.pdfIn PDF document text
    • http://zogoxuf.atwebpages.com/gifivaxoxiza.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/how_to_reset_a_kenmore_elite_stove.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2C 5284 bytes
SHA-256: 9a328ac8d5a7cbc224c78adcb4c1dee5d954a9b217b030fefea74d8edae41e49
font_01_sfnt_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 10448 bytes
SHA-256: 6cfbc551645d0d66bd0cc1a86900a650da38b9fe38ac2191469fd77d2e07ee90
font_02_sfnt_off0001120c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1120C 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15