Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffa4cfe2c97462a6…

MALICIOUS

PDF

88.7 KB Created: 2021-05-23 21:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 563ca12a07d1289278432cd2020231d0 SHA-1: afa9cc87b336a30744c666c2c0c176b6af452d9c SHA-256: ffa4cfe2c97462a6e02e6505475fce91b3a0784609ca03ed023d1e3aae2812d8
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that directs users to a suspicious domain, likely for credential harvesting or malware delivery. The document body, though heavily obfuscated, suggests a lure related to a 'rapid router level 53 answer'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=rapid+router+level+53+answer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412758/normal_6021f79c328cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489593/normal_5ff9579c7eadb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480403/normal_606928a56a04c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467561/normal_5fe90b49a4c09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fe789a8811f9.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/389cb064-712b-4247-84f4-bd04c69e4879/46428821446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d4397ad-7258-4339-8a0d-3285958b3b83/xuwuluj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6db04275-3b88-45cd-a4ab-ed304c0b7ace/what_is_a_business_casual_dress_code_policy.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/bejuzafarabirotadibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea72d37e-b740-4724-b62e-6294f83971b2/7131972744.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599dffc8-ce6f-4e95-857a-13281bf42594/what_are_the_three_elements_of_poetry.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/aspectjrt._jar_1._8._9.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/nds_emulator_for_android_6_app.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/barbershop_sheet_music_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/ben_10_omniverse_collection.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc33cdc-3d91-4d25-950f-8ecb37a401a7/14250219796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c23a96f0-50ce-454b-a48e-fb755678f71d/how_to_play_no_rules_fifa_21_online_with_friends.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac0f58b3-919a-4f08-b128-07e914a73b25/sig_sauer_pro_2022_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28a038a-09fd-4557-9518-de6ccb1f14c0/80909958916.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2d9430-ca67-4c3a-8549-756bb525b359/mogelufuropoberexaseno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e16f735-2943-4469-922f-5148205d03d4/42518163537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1603dd16-7087-4e5b-affc-738349b7e4c1/fimopisal.pdfIn PDF document text
    • https://s3.amazonaws.com/liluvad/viberoxegafin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f777a6d5-7ca4-45ee-a275-119f57171158/18463119095.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/tutudarulajevol.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/xitorufikofisujidi.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_off000117d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 5400 bytes
SHA-256: 32fd6d081bf006ff73868a5be04b56ba39d4612deeda1f04700ef01574db5dad
font_01_sfnt_off00012a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A5E 12496 bytes
SHA-256: 1353867b4b650a6aa9cbbaa62df25eeef62c82c169de85cb241b18bb0f474e80

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