Malicious PDF — malware analysis report

Static analysis result for SHA-256 20fd655b7a552a8a…

MALICIOUS

PDF

119.2 KB Created: 2021-04-08 02:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6d090a0da49fc9396ed296a2e5e90eb9 SHA-1: 2c585db649805e6878b1c98604741ffe9bd304ec SHA-256: 20fd655b7a552a8a8aa23475d40fe9a7b9c9cbc2a2449b3e1f566171340f80f2
164 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. It contains a large number of external links, with a primary focus on `http://bcpzonasegur4viabcp.com/4831703725312hzb.pdf`, suggesting it's part of a link farm designed to redirect users to potentially harmful sites. The presence of ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/strik?utm_term=illuminatus+trilogy+film PDF link annotation
    • http://bcpzonasegur4viabcp.com/4831703725312hzb.pdfIn PDF document text
    • http://ueuniti.xyz/63297960528p4uoo.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/8401075086jworo.pdfIn PDF document text
    • http://tukomibewi.getenjoyment.net/28026185688.pdfIn PDF document text
    • http://voztrans.ru/3994467597d1ay7.pdfIn PDF document text
    • http://all-host.site/the_crown_season_4_episode_7_cast_psychiatristkqqsc.pdfIn PDF document text
    • http://groby-ritual.online/conversion_cm_to_inches_worksheetsum5hg.pdfIn PDF document text
    • http://esportzmlevent.com/brother_p-touch_h100_anleitunggtesi.pdfIn PDF document text
    • http://gatorama.fun/wamilotexivrvd6y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8cff2b46-3289-4d4c-b6d5-84761b4963bb.filesusr.com/ugd/c91274_ae1bed96d3e347c6ab6fb024b1c3ed33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bf251f-ed27-459a-9700-e6521ffaa91c/combining_like_terms_with_negative_coefficients__distribution.pdfIn PDF document text
    • https://s3.amazonaws.com/woxojuxafopuv/life_and_death_stephenie_meyer.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/43339649127.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/90387802902.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be15924-87cc-4a3d-b83e-c12ea2c25c45/who_was_in_the_second_estate_in_france.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/tetawur.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/gojupidebiseredeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95661dd3-8dd6-4b0d-b75e-39b1981797c4/huskee_tiller_new_for_sale_north_carolina.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/binal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23f831fd-bcb7-424f-bf39-a5d1da912264/how_to_take_apart_a_taurus_pt-22.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_f9298854ba2145ffbcd7436817c5cbf6.pdf?index=trueIn 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_off000194ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x194CA 5128 bytes
SHA-256: 32cda1c360d19b4f3951810fd87c6f46539081c4c172cc89b1c960fec806ba06
font_01_sfnt_off0001a628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A628 11996 bytes
SHA-256: 64a0baab0cb46f37f4eaecf0b247b4228f299a8d6c08cb1361900e513eca61b6

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