Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7a3ca890cb987e…

MALICIOUS

PDF

101.6 KB Created: 2021-03-27 16:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 54f5ad85648b5a1f7dbeffb78bedb9d3 SHA-1: b5f09f23d3ddbada08af58ddf3284ecf168d10b5 SHA-256: 9e7a3ca890cb987e7a38a58538d4639b090d80872bf4bc94c0d6f57a4c1cecb2
126 Risk Score

Malware Insights

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

The sample was flagged by ML and ClamAV as malicious, indicating a high probability of malicious intent. The PDF contains numerous embedded URLs, with a significant portion pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the ML classification strongly suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://gimoguvi.ru/wix?keyword=delta+470+faucet+manual PDF link annotation
    • https://cdn.sqhk.co/tumakakebi/jbcihge/dirutabuvagopamowanisopal.pdfIn PDF document text
    • http://soxaxunobur.22web.org/33423277318.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/4xSiaTY/roluseduvatono.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/patab.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/26617085726.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebesoxu/gjpcJjg/tozogivubimafoduvoge.pdfIn PDF document text
    • https://cdn.sqhk.co/kobedobofepo/AhczWQ1/classic_brick_breaker_for_android.pdfIn PDF document text
    • http://getepitisux.mywebcommunity.org/mastering_the_rockefeller_habits_verne_harnish.pdfIn PDF document text
    • http://vuvulusigi.scienceontheweb.net/mulalugukobiranirurugagem.pdfIn PDF document text
    • https://cdn.sqhk.co/reposivekow/444hbPR/dragon_quest_dai_no_daibouken_2020_episode_3.pdfIn PDF document text
    • http://jinevul.mygamesonline.org/47569215481.pdfIn PDF document text
    • http://melofuwi.getenjoyment.net/langman_s_medical_embryology_14th_edition_free_download.pdfIn PDF document text
    • http://kumorafeg.iblogger.org/kinnickinnic_river_fishing_guide.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/rorigavasijej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.orgThisIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/doxifuba/90290276714.pdfIn PDF document text
    • http://naburonip.myartsonline.com/voice_warm_up.pdfIn PDF document text
    • http://fiwusinuba.rf.gd/answer_key_mpsc_2016_pre.pdfIn PDF document text
    • http://sewitowapib.epizy.com/dd_rules_cyclopedia_amazon.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/kiwadadodimug.pdfIn PDF document text
    • http://wofodumav.rf.gd/azhage_bhramanidam_audio_song_free.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/samsung_will_not_turn_on_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafef55f-5e3e-46e8-b11a-9affe66ab1bf/does_a_2018_honda_civic_need_synthetic_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f717ab2-79f1-40d1-b33d-229886847171/vermont_castings_radiance_gas_stove_manual.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
    • http://scripts.sil.org/In PDF document text
    • http://scripts.sil.org/OFLAbyssinicaIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F20 4784 bytes
SHA-256: 85fcfa820695909b588a04b9b3343b3f111635376b3c62aab09a6b525d4654dc
font_01_sfnt_off00012f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F69 21140 bytes
SHA-256: 3b97f2142cf2c6d06274ba3536ed14bc6aaa8da4cb4149963c4da3b6d8492e38
font_02_sfnt_off00015025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15025 13784 bytes
SHA-256: 1ea25f42117230b29387fef162a9615e8894eaa0cdf1d991a75b83eba89d7e6b
font_03_sfnt_off00017a55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A55 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176