Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af23809685441d3…

MALICIOUS

PDF

77.4 KB Created: 2021-02-22 16:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 039f8f4087bc5817616bc225e8bbf865 SHA-1: fad7df05d0fc25e85bfed35bdcd7d6480777e881 SHA-256: 2af23809685441d3f79931db5b87c11251ae58605175ebbd5e7e6a956f273543
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary focus on a URL related to 'biofit garcinia cambogia', suggesting a lure for phishing or to download further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further supporting a malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' confirms the malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://bologen.ru/wix?keyword=biofit+garcinia+cambogia PDF link annotation
    • https://cdn.sqhk.co/xaselavub/hgifjju/xeresozobadurokipuvumek.pdfIn PDF document text
    • http://freshnatur.fun/segepekiwawatof1r16.pdfIn PDF document text
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/sizerusira-varesebag.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/734700.pdfIn PDF document text
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/9f64abfe2b.pdfIn PDF document text
    • https://mokoxofedig.weebly.com/uploads/1/3/4/8/134891763/9b817.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/9542001.pdfIn PDF document text
    • http://hdsamara.ru/arsenic_based_life_form99j83.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/yubhjea/64114890517.pdfIn PDF document text
    • https://laduvozonos.weebly.com/uploads/1/3/1/4/131408864/wasegenenu-bewibenaju.pdfIn PDF document text
    • http://onlineeshop24.xyz/4145021915872y41.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
    • https://s3.amazonaws.com/pusolefosex/bavojozisupiku.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/bypass_surgery_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/8729928411.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/bigeninujusuwukubawakigu.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/18034479294.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 4852 bytes
SHA-256: a89e0fc6056a12a5ed326a573ee9e1000c488a7cd36231fcfb8df0772afd22b6
font_01_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 10408 bytes
SHA-256: d46a5d522371f8d721a9acf844f8ba42ab830d57f832b85ff3b8fad7b953f109
font_02_sfnt_off00011a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A8D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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