Malicious PDF — malware analysis report

Static analysis result for SHA-256 567f4336f3415fbe…

MALICIOUS

PDF

102.4 KB Created: 2021-03-29 12:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c56b2e598eb445571134d46221162c66 SHA-1: 0989565bfee892171f9ae514ac7e33464d871d09 SHA-256: 567f4336f3415fbe9fb616b30c53280e9165ef1d854b12bc58432136c6ebcffe
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The sample is a PDF file flagged by multiple heuristics and ML classifiers as malicious, specifically for credential phishing. It contains numerous external URLs, several of which point to disposable hosting or redirectors, and one explicitly impersonates the HSBC brand. The document body is heavily obfuscated, but the presence of brand impersonation and external links strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/rusofexegi.pdf.
  • 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://leonvi.ru/wix?keyword=gta+online+house+guide PDF link annotation
    • http://sewakasatixori.medianewsonline.com/harmonic_oscillator_quantum_mechanics.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/programmable_logic_controller_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445130/normal_60327fda8397d.pdfIn PDF document text
    • https://sifobidegi.weebly.com/uploads/1/3/0/8/130874382/rusofexegi.pdfIn PDF document text
    • http://vebuwovivulab.mygamesonline.org/vepilan.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/perdona_si_te_llamo_amor_trailer_english.pdfIn PDF document text
    • https://pasojifet.weebly.com/uploads/1/3/0/7/130776368/c9d4c6ea81d2a2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_605d39734a826.pdfIn PDF document text
    • https://vonenefanor.weebly.com/uploads/1/3/4/6/134638091/kokerafusen.pdfIn PDF document text
    • https://sirabirimafo.weebly.com/uploads/1/3/0/7/130739431/zawiximijuwuw.pdfIn PDF document text
    • http://dojemop.mywebcommunity.org/gotodekefele.pdfIn PDF document text
    • https://cdn.sqhk.co/dagozuwemep/SZ3gdNA/74812574050.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/datijuzig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369516/normal_60236273329ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403283/normal_604ccb469a54b.pdfIn PDF document text
    • https://cdn.sqhk.co/tarekekog/fhejhid/65920783139.pdfIn PDF document text
    • https://cdn.sqhk.co/kefaforuletu/jcjghcX/nikonimedaloxavizojisu.pdfIn PDF document text
    • https://cdn.sqhk.co/fomavulobet/m9jfMhj/29999306679.pdfIn PDF document text
    • https://cdn.sqhk.co/xunijejozi/eCHhfjf/money_maker_2_chainz_lyrics.pdfIn PDF document text
    • https://vifekifuveju.weebly.com/uploads/1/3/4/5/134597055/9077883.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/669d1510-b991-48a6-a2a6-163420990a06/how_do_you_reset_a_rinnai_tankless_water_heater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce3ad6c-1071-4af3-a414-a55370ad943d/326600444.pdfIn PDF document text
    • http://wipibefab.onlinewebshop.net/77434546382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ea800e0-f944-4c33-baa5-cfa5fadfc0b3/01_subaru_outback_engine_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/346800d5-dc9a-47be-a772-679595a1b18e/gamiguxegapovep.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_off00015489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15489 5024 bytes
SHA-256: 0b135dfc9de4bf5b42548578358922ebf2af24ef2e62add0b368ef246fd72fb3
font_01_sfnt_off0001659a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1659A 11472 bytes
SHA-256: 1069630db62e933c737693c23e6af54d0e05ff2d59df126d2be157fa62c22f94