Malicious PDF — malware analysis report

Static analysis result for SHA-256 27aba52ff52e6dcb…

MALICIOUS

PDF

72.8 KB Created: 2021-01-25 22:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 039f0f7ffc6084e2f51a4ef821bff988 SHA-1: 8b1bd36d58ac78d8d48c8898601fc82c26ad9a34 SHA-256: 27aba52ff52e6dcb0a07b44fffc5f9b5fb496b71ff8cb2ba71f768c05fb2ae98
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, 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. One URL, https://druttle.ru/123?utm_term=lax+to+fiji, is directly embedded and likely serves as a redirector. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of phishing or malware distribution attempts.

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://druttle.ru/123?utm_term=lax+to+fiji PDF link annotation
    • https://cdn.sqhk.co/kinanekoxo/jekn2gd/michael_reeves_ding_ding_3d_print.pdfIn PDF document text
    • http://stavki-na-sport.site/war_of_the_roses_neville_family_treebtyk2.pdfIn PDF document text
    • http://myirn.icu/colored_rolling_papersz61dx.pdfIn PDF document text
    • http://goodnatural.space/713486150630rbrh.pdfIn PDF document text
    • https://cdn.sqhk.co/libodinidep/4igbicV/ballet_hop_st_laurent.pdfIn PDF document text
    • https://teraludejos.weebly.com/uploads/1/3/5/3/135304334/bedbf513fef8ac2.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/Ihehdcl/liwavige.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/jijhjim/92857599405.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/Yje8sMQ/73891219970.pdfIn PDF document text
    • https://kabenodetaxixum.weebly.com/uploads/1/3/4/7/134754863/loduvubokajaba.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/2981944.pdfIn PDF document text
    • http://zobebukore.22web.org/99227953472.pdfIn PDF document text
    • https://cdn.sqhk.co/wexufenu/ifjdgiL/happy_birthday_cake_images_for_mother.pdfIn PDF document text
    • http://rollernefrit.xyz/944967324hbthg.pdfIn PDF document text
    • https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/74cc7a5b0420a.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/Jhicgha/77893138925.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satuzolo.epizy.com/58919099201.pdfIn PDF document text
    • http://xubaforan.epizy.com/crystal_reports_2016_cost.pdfIn PDF document text
    • http://surobufalinaxis.epizy.com/cardiac_muscle_structure.pdfIn PDF document text
    • http://wadobenozunon.rf.gd/audio_vision_video_maker_editor_apk.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_off0000e221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE221 4540 bytes
SHA-256: c17a0b6630779b1767e10f7792a4e870e4160c6b3e4555a3069ee09e00f05035
font_01_sfnt_off0000f1be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BE 10780 bytes
SHA-256: 1171e42af21419a1e5b917b5a6b2ad331a8952efd83cad6bef3b77ed3b23aa17

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