Malicious PDF — malware analysis report

Static analysis result for SHA-256 248b8dee1fdba537…

MALICIOUS

PDF

79.7 KB Created: 2021-02-12 17:09:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3d4cff954880f2786c4adecf6484e19d SHA-1: 59b080c9eb253ba4ece37b608cfe93330b1f971b SHA-256: 248b8dee1fdba5379b126a6f33207d976fdc6da810b582bc6079ac44c601d84d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, directing users to various websites. One of the primary URLs, 'https://jacksth.ru/wix?keyword=new+deal+political+cartoons+and+explanations', suggests a lure related to political cartoons. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest a phishing or link-farming attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://jacksth.ru/wix?keyword=new+deal+political+cartoons+and+explanations PDF link annotation
    • https://xusudunegowubub.weebly.com/uploads/1/3/0/7/130739081/4695690.pdfIn PDF document text
    • https://cdn.sqhk.co/litawoxelida/iAgcic6/ludovox.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/eic9hcq/pixel_survival_3_hack_apk.pdfIn PDF document text
    • https://lufokojas.weebly.com/uploads/1/3/5/3/135398832/2264675.pdfIn PDF document text
    • https://mibajajezek.weebly.com/uploads/1/3/4/0/134017497/3525354.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/sie4sZ1/high_speed_motorcycle_games.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/kozavaw.pdfIn PDF document text
    • https://cdn.sqhk.co/jafetegupam/cZljhd3/final_fantasy_iv_psp_ebay.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/h24gfvD/xonufigofoxevaresu.pdfIn PDF document text
    • https://cdn.sqhk.co/pixafosabow/jbZiajc/subway_surfers_online_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/yiijhhh/89957090678.pdfIn PDF document text
    • http://itactical.xyz/mevonar8qo4o.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/zodererezuzuxi/25863231117.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/bokivalogi.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/location_preposition.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/majazegapepuv.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/15088543113.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/laying_vinyl_sheet_flooring_in_bathroom.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/movies_2018_bollywood_3gp.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_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 4984 bytes
SHA-256: 53f6bb24a8198ac5144a9eec842374f9307ddc414c609bcd113f1cb68aa5c835
font_01_sfnt_off00010067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10067 10080 bytes
SHA-256: 6999a934585f1c8061d3d7425e1af3bbd259e8911c92b4124f001499ae070f33
font_02_sfnt_off000122e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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