Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e452e7786860ba7…

MALICIOUS

PDF

80.3 KB Created: 2021-03-21 23:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 65c5c48425a48f829ca95edabac712ee SHA-1: 05c8481dd6b730d7ded6474ae7aa490c12a137f8 SHA-256: 6e452e7786860ba75a2d25b6170c762cb47f2a573c35f2724710b6c2b0705da0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated, suggesting a link farm or SEO manipulation tactic. ClamAV and ML classifiers identified this PDF as malicious, specifically a phishing trojan. The embedded URLs point to various domains, some of which are associated with benign content, but the overall pattern and detection results indicate malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://xezojetit.ru/award?keyword=aromatherapy+history+pdf PDF link annotation
    • http://mitatizizuje.mypressonline.com/wowirixekizof.pdfIn PDF document text
    • http://grantmedica.ru/zesemigapibajigidomobivudf08rn.pdfIn PDF document text
    • http://instup.xyz/what_is_the_big_star_in_the_west_tonight0v3su.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/gizeleligafaposakunif.pdfIn PDF document text
    • http://usacarins.com/turebifoveda1b3kl.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/33140796080.pdfIn PDF document text
    • http://ruwufuwetoj.mygamesonline.org/graco_nautilus_65_3-in-1_harness_booster_car_seat_manual.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/gopro_hero_3_plus_silver_battery_lifetoxqf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotudokizer.onlinewebshop.net/texenubixotixusuda.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/25597671668.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/nesopal.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/65172596159.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/74538873435.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/constitution_scavenger_hunt_with_political_cartoons_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/8271947386.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/windows_10_sound_drivers.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_4ac009b1b6e84b90a9353e46d8c9d522.pdf?index=trueIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_5715155d23564a0e8eb529abc9688768.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bidivo/59508613223.pdfIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_83a2baa29f874117a2b238728d9a054a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/47227069715.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_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 5340 bytes
SHA-256: c5d51bda012d86a91417d3aef4b316657b7598d68ffc7b456d7b5d4806a21819
font_01_sfnt_off00010f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F7E 10680 bytes
SHA-256: 2219c4931db963b1e83967de36f31f20cf9a0a11fdf250700cc2f71cffd0ab28

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