Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9658034b19bbd33…

MALICIOUS

PDF

77.8 KB Created: 2021-03-07 17:56:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcf2839307910d63133213217cb6aa99 SHA-1: 5eb0635046fdeaa6de964fa62f5b64725e91eec6 SHA-256: d9658034b19bbd33b888094de298af80172337df74242ebfe92ed18525e8768a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, many pointing to PDF files, suggesting a link farm or SEO spamming technique to drive traffic to malicious sites. The embedded URL `https://lozipotod.ru/123?utm_term=best+penny+stocks+august+2020+robinhood` indicates a potential lure related to financial topics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://lozipotod.ru/123?utm_term=best+penny+stocks+august+2020+robinhood
    • https://cdn-cms.f-static.net/uploads/4418166/normal_5fe68bb631373.pdf
    • https://cdn.sqhk.co/kabolode/NgjCjjo/55998087190.pdf
    • https://static.s123-cdn-static.com/uploads/4372354/normal_6006a98414af0.pdf
    • https://cdn.sqhk.co/feketukadoz/gcgcSPX/rulanotuwapumiparigatib.pdf
    • https://cdn.sqhk.co/wojipezusax/cgejbge/id90_travel_careers.pdf
    • https://cdn.sqhk.co/xixujipum/b2gjjjK/empire_millennium_wars_cz.pdf
    • https://cdn-cms.f-static.net/uploads/4369149/normal_6038737e01822.pdf
    • https://cdn-cms.f-static.net/uploads/4369519/normal_60153f9c1276b.pdf
    • https://cdn.sqhk.co/miviterul/Lygigdn/27416074194.pdf
    • https://static.s123-cdn-static.com/uploads/4365626/normal_5ff38202d349c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6f61a60f-561f-4702-9d51-ccfb5c66b93d/when_did_the_taylormade_r15_driver_come_out.pdf
    • https://s3.amazonaws.com/suxiweke/angular_7_form_group_example.pdf
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_b11c81c1c6da4bc79391012558f8edfb.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e87646c2-d3fe-4340-b18c-a074b40a19c1/motorcycle_diaries_full_movie_english_subtitles.pdf
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_4013db02cd5f4453ba2a99ca4ca84dc8.pdf?index=true
    • https://s3.amazonaws.com/bezegoluzose/what_is_trade_unionism.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f1cd.bin
ff123ad7a38acf93f42be03e231f2476df773ace58debf91caaabb813d9e036a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 5932 bytes
font_01_sfnt_off00010603.bin
b0b439da1436371709b5c15c57b81a9ec9b5f61192232e479be76ee44bca9e46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10603 10640 bytes

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