Malicious PDF — malware analysis report

Static analysis result for SHA-256 59d954897e2cd99c…

MALICIOUS

PDF

81.7 KB Created: 2021-03-20 16:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f7f65d6da6a87f6caefa6fe1892663a4 SHA-1: aa4b66e911d6d152ac90422bc4a242c1d5fe69fd SHA-256: 59d954897e2cd99c7e682cffad3785e852657130f443fa6a123cfd8d02ee1d94
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=atmega16+microcontroller+pdf PDF link annotation
    • https://dubiriji.weebly.com/uploads/1/3/1/4/131406762/dikusiw.pdfIn PDF document text
    • https://vasuwogi.weebly.com/uploads/1/3/4/0/134017955/dewulesif-tifotanolevu.pdfIn PDF document text
    • https://dodapufil.weebly.com/uploads/1/3/0/8/130813701/lorubefarad-navefejuje-guzuma.pdfIn PDF document text
    • http://fevozogu.iblogger.org/what_is_the_phantom_of_the_opera_mask_called.pdfIn PDF document text
    • https://cdn.sqhk.co/gujurolekuma/igecgd2/jezogomex.pdfIn PDF document text
    • https://fimopokiwuzik.weebly.com/uploads/1/3/4/7/134736862/2b6d21fc.pdfIn PDF document text
    • http://vosiwikaxipe.22web.org/rock_paper_scissors_movie_parents_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/navififoro/jcvQgcX/happy_manila_song_all.pdfIn PDF document text
    • https://soravetojovon.weebly.com/uploads/1/3/4/8/134890923/pupora-ribadimumazaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_075a19aeb28a48248c15520e2e303889.pdf?index=trueIn PDF document text
    • http://kikivalisexe.epizy.com/etiology_of_gestational_diabetes_mellitus.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/novimojesitewepowufibomuk.pdfIn PDF document text
    • http://manegatuwofif.epizy.com/coleman_hot_tub_sns_code.pdfIn PDF document text
    • http://jiwodiw.myartsonline.com/gajager.pdfIn PDF document text
    • http://junenizexi.epizy.com/jafaxoxekuxibobotowoni.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_10797422de1e4b2997dc274094b5ec78.pdf?index=trueIn PDF document text
    • http://sawamujimas.epizy.com/jorusaxefeposorotija.pdfIn PDF document text
    • http://dujabonesisu.rf.gd/94636652591.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_f78dbc80a2434070b019f89de13f28f2.pdf?index=trueIn PDF document text
    • http://jipudovisubu.rf.gd/coeur_d_alene_lake_fishing_report.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_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 5492 bytes
SHA-256: a312eb0245e5bb5341a1dbb5d70c4762c8111fef13a76c05aa8ecbb53c810988
font_01_sfnt_off00011330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11330 11172 bytes
SHA-256: 4c28ab993390645d5d4f49dd4d520fca7f3cf430d31086b0b4562dc51cf8409b

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