Malicious PDF — malware analysis report

Static analysis result for SHA-256 59520440b3bc67e0…

MALICIOUS

PDF

76.5 KB Created: 2021-03-28 14:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 048cc8db8e16ff0aa85b1595b86c9488 SHA-1: 56c092681926d0c99d3ab7fddc1ec3c7e72f4862 SHA-256: 59520440b3bc67e051197ac4d1b2f492c52a39dc4b8788881dc4e39806fd8765
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/award?keyword=bncc+pdf+2020+baixar PDF link annotation
    • https://sosanibizug.weebly.com/uploads/1/3/2/6/132695556/miguzuwatejibiwunib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ff9ef77b14b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601d2780c8919.pdfIn PDF document text
    • http://titonigofitazi.iblogger.org/mulirafuxubotiror.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/hhBU84i/sanogofovulanikekuwu.pdfIn PDF document text
    • https://sibevuguz.weebly.com/uploads/1/3/4/8/134859718/pejisapabaxuj.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/fiehghb/battle_bay_best_weapons.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/what_are_the_types_of_conclusions.pdfIn PDF document text
    • https://cdn.sqhk.co/vafegijateno/gf1Yiet/best_auto_like_bot_for_instagram.pdfIn PDF document text
    • https://cdn.sqhk.co/pikuworano/wRjhgdF/screenplay_tv_link_dx_hd_media_player.pdfIn PDF document text
    • http://widaxaruko.mypressonline.com/javascript_tutorial_point_full.pdfIn PDF document text
    • https://pazudafodimaje.weebly.com/uploads/1/3/0/7/130776249/e2763f957bbc03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367912/normal_6006f03763e61.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/5SjeQ1c/transformers_earth_wars_duplicate_characters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/aha_dvt_guidelines.pdfIn PDF document text
    • https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_d3242280f62d4b3ebd51a631e66606b1.pdf?index=trueIn PDF document text
    • https://feedbc21-cb93-402c-9ae2-3476589645d2.filesusr.com/ugd/f3ecbe_090e189c6668436683f1137ae6c92df4.pdf?index=trueIn PDF document text
    • https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_d69729962f5f4feba25568aadcd4bb03.pdf?index=trueIn PDF document text
    • https://f37c3615-20b0-4e70-b1e7-2acf34113780.filesusr.com/ugd/1e533a_ca165dbacc6a4082bb2f0a1794eb1186.pdf?index=trueIn PDF document text
    • http://kunerev.epizy.com/siven.pdfIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_7e4e860293e94d80bf5e42848fefc068.pdf?index=trueIn PDF document text
    • http://dejedizanabi.epizy.com/high_thread_count_cotton_bed_sheets.pdfIn PDF document text
    • http://ribaxekag.epizy.com/nubexalavot.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_off0000e96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96F 5472 bytes
SHA-256: 72d867f2dfa5ae5abb6345c6249375f3d175b4a844fc4c237416b45e9ec0e908
font_01_sfnt_off0000fc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1F 12920 bytes
SHA-256: cf7c52b3e15984149a596923d66e116dea7509108e7e6526abb91bcf0413cbd9