Malicious PDF — malware analysis report

Static analysis result for SHA-256 072c6bf964e5bb81…

MALICIOUS

PDF

85.1 KB Created: 2021-03-26 08:32:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7175dfb3e1304ec1b39cc328041cadaa SHA-1: 293a18371bd0be477517a33ba493c6dca8551b74 SHA-256: 072c6bf964e5bb81cc941d0356c5ebb57851c47309090952c8e7da33cbec9c4d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://resalured.ru/strik?utm_term=common+pronunciation+errors+in+english+pdf PDF link annotation
    • http://jabisoj.22web.org/75030778477.pdfIn PDF document text
    • https://tuxakosubulep.weebly.com/uploads/1/3/4/0/134012578/wabunosifuniropote.pdfIn PDF document text
    • https://nesexabaxurozij.weebly.com/uploads/1/3/4/8/134898102/6793587.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/0398fd4edcda2e.pdfIn PDF document text
    • http://dawepajez.22web.org/57253463585.pdfIn PDF document text
    • http://lizuzezusad.medianewsonline.com/bando_automotive_belt_catalog.pdfIn PDF document text
    • http://nakozek.mypressonline.com/biology_mcq_free_download_for_neet.pdfIn PDF document text
    • http://daddytestit.xyz/53620633501iifbg.pdfIn PDF document text
    • http://pepujolajerikur.66ghz.com/anthem_blue_cross_medicaid_appeal_form.pdfIn PDF document text
    • http://white-x.fun/what_is_the_best_quality_samsung_tvc66jd.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/gutamotimimudefapigixa.pdfIn PDF document text
    • https://pijatopug.weebly.com/uploads/1/3/5/3/135303623/a43756d.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/12895549606.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/63395755787.pdfIn PDF document text
    • http://strapslap.online/kowatemesunurimonoywifw.pdfIn PDF document text
    • http://teenagetutor.net/free_rear_view_mirror_hang_tag_templatewru0w.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/sejodi-petavafatejiz-zazena.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
    • http://jidibavozajo.epizy.com/84911537218.pdfIn PDF document text
    • http://gipuzasidu.rf.gd/gesukovufenolepemasufoz.pdfIn PDF document text
    • https://s3.amazonaws.com/polexebuj/importance_of_information_literacy_skills_for_an_information_literate_society.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/husqvarna_chainsaw_455_rancher_chain_sprocket.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/vesifapodalej.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/black_widow_comic.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_off0000fbf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF2 5476 bytes
SHA-256: e4f7373f83b5318e03fe45af5ba2eaeec43f0da92fb41804923cdd84112a6e4a
font_01_sfnt_off00010e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E59 12892 bytes
SHA-256: a13dafc4df12b91ac1a85cd4f55b60f004ccd1569151aa64991b4c3e4e0d61b7
font_02_sfnt_off000138db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138DB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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