Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d96f0d956f3233…

MALICIOUS

PDF

94.6 KB Created: 2021-03-04 17:57:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b51b2206db960cd1354b0c4280bc756 SHA-1: 24c3840fe449b3f4943822ca782cf5fba16f512c SHA-256: 67d96f0d956f3233169aa253779a0117820f9c541c192a5f6a40d08e3f446c94
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and numerous external links indicate an intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://botokaw.ru/strik?utm_term=how+much+does+a+manager+at+a+restaurant+make PDF link annotation
    • http://help-igcopyright.xyz/kokesamunifeltkgl8.pdfIn PDF document text
    • http://natikolom.site/flyboys_movie_questionskyy7u.pdfIn PDF document text
    • https://romubavopu.weebly.com/uploads/1/3/4/8/134884942/91b1e38b3f.pdfIn PDF document text
    • http://creditinquiry.info/55069826109bk0k6.pdfIn PDF document text
    • http://futajef.medianewsonline.com/collins_english_book_class_7.pdfIn PDF document text
    • https://fukaxoxatu.weebly.com/uploads/1/3/1/4/131438517/rosejegeguveva_rufuzinag_fabet_nujozizag.pdfIn PDF document text
    • https://futiwoku.weebly.com/uploads/1/3/5/9/135957929/016c8ceea442f.pdfIn PDF document text
    • https://vawilateg.weebly.com/uploads/1/3/4/6/134697686/9278266.pdfIn PDF document text
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/lugapenujekopuki.pdfIn PDF document text
    • http://sekelenogake.getenjoyment.net/everything_i_want_to_do_is_illegal_download.pdfIn PDF document text
    • http://tublitalia.space/percy_jackson_and_the_lightning_thief_book_pageshhhv8.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/molewisedadovofo.pdfIn PDF document text
    • http://doxisolawasusig.66ghz.com/photos_ananas_free.pdfIn PDF document text
    • http://wisecreditscore.info/lusadevelupategobawixuputzphd9.pdfIn PDF document text
    • http://hiziryigit.online/rt_ac68u_specsgsx2g.pdfIn PDF document text
    • http://timelessdecorum.com/jilarenazukotinuramo20h0l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bufafaloverodi.rf.gd/hacking_bangla_book_free.pdfIn PDF document text
    • http://vonefufekoja.rf.gd/avast_antivirus_lifetime_license_key_free.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/40410286172.pdfIn PDF document text
    • http://jujobope.atwebpages.com/what_is_the_communicative_purpose_of_the_text_singapore.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/google_login_button_android.pdfIn PDF document text
    • http://motifegoku.epizy.com/snow_white_disney_princess_characters.pdfIn PDF document text
    • http://bogalibamadom.myartsonline.com/do_lizards_live_alone_or_in_groups.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_off000134e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E5 5440 bytes
SHA-256: 93e180ae5ec5027454265e881318d6a26d96328aab2d44d3d546979c04a6a72d
font_01_sfnt_off00014746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14746 10716 bytes
SHA-256: 7c081274eeb28c71350d0763ac9572c7299cb493cbe630c118f64a6eb15bb94e

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