Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42713d39387f6b7…

MALICIOUS

PDF

84.6 KB Created: 2021-03-11 08:43:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4f8c5598d41efb61e5de0033a70ad0fa SHA-1: 5bfe3342d0159fb4bcc6abf600fbc87c075dfe92 SHA-256: d42713d39387f6b74858414010c0bef2935ee5ce29aab23dfd531376204587df
164 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one specifically identified as a potential phishing lure related to a movie script. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of many external links suggests a redirection or download mechanism, likely involving embedded JavaScript or similar techniques to facilitate the attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/strik?utm_term=steel+magnolias+movie+script+pdf PDF link annotation
    • https://sidatenut.weebly.com/uploads/1/3/5/3/135349940/bumarokiku.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/2877824.pdfIn PDF document text
    • https://jumugixaz.weebly.com/uploads/1/3/6/0/136028190/3218735.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/hfjibjc/fovawap.pdfIn PDF document text
    • https://cdn.sqhk.co/manaruparil/XheEjam/happy_wednesday_fall_pic.pdfIn PDF document text
    • https://cdn.sqhk.co/wularumijif/c0Z89ib/41434492907.pdfIn PDF document text
    • https://zupitexugavasol.weebly.com/uploads/1/3/0/9/130969618/7847d2d2.pdfIn PDF document text
    • https://nefolebar.weebly.com/uploads/1/3/4/4/134400051/jajoputajuworetume.pdfIn PDF document text
    • https://dovoviwum.weebly.com/uploads/1/3/0/7/130776035/7b698f.pdfIn PDF document text
    • https://sujepofuk.weebly.com/uploads/1/3/0/7/130775011/fadenowimabol-todup.pdfIn PDF document text
    • https://sovanomi.weebly.com/uploads/1/3/5/3/135337195/6813929.pdfIn PDF document text
    • https://cdn.sqhk.co/pobumepova/9ihWhia/the_wolfman_1941_full_movie.pdfIn PDF document text
    • http://wejuveziwep.mypressonline.com/sujofevejopufotunek.pdfIn PDF document text
    • http://xomutukegadoj.mypressonline.com/61360666957.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zujisofivo.onlinewebshop.net/25504604508.pdfIn PDF document text
    • http://pojoviraxerojo.myartsonline.com/rodod.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/bogowereluxigavimuvapeka.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/vilabovib.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/hungry_shark_free_with_cheat.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/why_does_my_acer_laptop_screen_go_black.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/graffiti_font_styles_free.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_off000101f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F8 5636 bytes
SHA-256: b3d43aaeeafd6ef96d42563348f11fbcd82b13ad488d4805c49d32f539b1c963
font_01_sfnt_off00011520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11520 15244 bytes
SHA-256: 55b5432accda53b54978f24b43adf6817e919dc70a02cf082f16f0864043e77c

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