Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fc0b27e7ee0c12b…

MALICIOUS

PDF

73.9 KB Created: 2021-03-23 13:56:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 63271cc23c379a2eb7fdd3e02e9a41ed SHA-1: 4a9ebcb25009d3ec8cda3355bbeaa17d8e7bab4c SHA-256: 0fc0b27e7ee0c12be32a1cb1b4b9dce5f073ad123eb60259edc1c8103b3cef7c
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to an 'Android 10 update for huawei nova 3i', indicating a lure to trick users into clicking the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/123?utm_term=android+10+update+for+huawei+nova+3i PDF link annotation
    • https://xikofekukinakij.weebly.com/uploads/1/3/2/6/132681309/widege.pdfIn PDF document text
    • http://sisogelodaze.medianewsonline.com/vevivaxelogofone.pdfIn PDF document text
    • https://cdn.sqhk.co/fupupusamun/QidjeHY/jemazubimovalazagenumew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424951/normal_5ffeffa059df2.pdfIn PDF document text
    • http://bazis-rostov.com/user_acceptance_testing_planyu1mi.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/hf6Wigh/xetofudujapebaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385647/normal_60532b852869c.pdfIn PDF document text
    • http://policyhelpcenter.com/carols_by_candlelight_2018_melbourne_tv_guidefucoq.pdfIn PDF document text
    • https://pakilimog.weebly.com/uploads/1/3/4/3/134363837/lupuro.pdfIn PDF document text
    • http://weareanonymous.org/19251374304v8toq.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/icidia4/jetpack_joyride_for_windows_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481273/normal_600f64d9ed008.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/3526967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_60181b81113b5.pdfIn PDF document text
    • https://cdn.sqhk.co/gisatajofo/Hjijvjd/napesigazofinonitojeja.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/remeranexe/stadler_form_charly_floor.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/vukuguwo.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/calgary_city_map.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/bovumofasixuxutikuta.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/asme_b31._3_process_piping_code.pdfIn PDF document text
    • http://vowojuxibaxo.myartsonline.com/nevowapurugidulitoru.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/punagupetixusesekave.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_off0000d7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DF 5416 bytes
SHA-256: 38d45bd720e2ed41458dd8195839903450edf28931578effaebdb93b51194a57
font_01_sfnt_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 20576 bytes
SHA-256: 90168b649e0889cf5734c76f3a002ca01d2194144d7e4df5a318b27feba9cc12

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