Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e78f00a350bc25…

MALICIOUS

PDF

70.1 KB Created: 2021-03-02 13:32:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d2064815771c1f5094cccfadc84fb749 SHA-1: a03face698f2eb4b670008aeea2afc4fffd9d2bf SHA-256: 06e78f00a350bc2537f6acf36e8c9f5e8ac7ec5959265c9a35d78a841ba3abd3
126 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful sites. The presence of 'utm_term' parameters suggests tracking or obfuscation for phishing campaigns.

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 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://jacksth.ru/aws?utm_term=amana+80+sse+limit+switch PDF link annotation
    • http://dressnbuy.com/in_christ_alone_owl_city_piano_sheet_musiclycs9.pdfIn PDF document text
    • http://poopo.ru/how_to_work_out_calories_in_food_nzwgfb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5fd3b8f494303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_603bcecd90914.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/15120302293.pdfIn PDF document text
    • http://fumigatoff.online/what_is_the_best_photoshop_program_for_beginnerswckn4.pdfIn PDF document text
    • http://blacktea.space/570291818inmzq.pdfIn PDF document text
    • http://allieshouseofhope.com/what_does_sisterhood_mean_to_you_sororityn5wd4.pdfIn PDF document text
    • http://trenketo.buzz/best_dungeon_crawl_classics_modulesn7q5y.pdfIn PDF document text
    • http://afracheat8.xyz/velodrome_bike_weightdkjbh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480595/normal_6012c3807cb8d.pdfIn PDF document text
    • http://reduslim-italia.website/rugisumn1gti.pdfIn PDF document text
    • http://fabermanufacture.ru/verbal_reasoning_questions_and_answers_for_wiproyr3u3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_601fcc751169b.pdfIn PDF document text
    • http://furniture21.online/86241348126986ox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375195/normal_6015c6913d9db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/37711746412.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/bandicam_crack_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/woxewiwupir/bootstrap_grid_template_w3schools.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/blacks_law_dictionary_apply.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_off0000d556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD556 5360 bytes
SHA-256: 84c66b89428c65d7657b46ed2b85bfa1fbc3c0632feca3e1f94c8e4bc75edcd4
font_01_sfnt_off0000e778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 10524 bytes
SHA-256: 54035e0c1aac46c00579f10c02c778f0920d7aa7ec414623a7d31a02500a7984

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