Malicious PDF — malware analysis report

Static analysis result for SHA-256 8951c2bcbfa04d8e…

MALICIOUS

PDF

74.6 KB Created: 2021-03-07 22:42:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a4d2b08c8291de6b0b864998983089d0 SHA-1: 2946423b333933e7f4a5bf7f3e26d87f80b122d9 SHA-256: 8951c2bcbfa04d8e11f341483131798716956f9670e658d1bcc88f0bcfa1566a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, appears to contain text related to the apocrypha, suggesting a lure to trick users into clicking the malicious link. No scripts were extracted, but the presence of the malicious URL and the ML detection strongly indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/123?utm_term=what+are+the+14+books+in+the+apocrypha PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4477367/normal_5fe4dbe7566b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488592/normal_5ff3d48c023b0.pdfIn PDF document text
    • http://kyponnik.online/xivelokasubovomezgr008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5fc8d38f90c0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422893/normal_6008698f2c2e1.pdfIn PDF document text
    • http://erogan-oficial.site/what_does_a_florida_tree_frog_sound_likevl74f.pdfIn PDF document text
    • http://storezone.info/48325560509wu4u4.pdfIn PDF document text
    • http://nukicew.xyz/varitimovixabezegovuto23lo.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/98be4f89-81da-498a-ae4d-3dcf8c864b31/tupac_poetry_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7161ea45-a843-4827-befb-191a17b948cf/dnd_5e_name_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/academy_of_management_executive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de191fae-b831-4701-8682-0dcf325ef049/panaratojusijidopagala.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b59419-5b9d-49e0-91a1-897f43b07c88/53869428811.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/1779708403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022d6f94-8843-452c-9acf-b30ecda8c548/pirates_of_the_caribbean_piano_notes_easy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb519935-5e67-4c1e-bfe0-484d9267244c/samsung_tv_customer_care_number_in_pondicherry.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2482b73b-993d-4815-b4cd-4c5ce21e2eef/hip_hop_drum_beats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0e5e427-fa51-4180-a4b7-43d07b8b9105/gidisemilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b3521c4-664f-4e7e-ba6e-d369754d3bd8/xijujukewikevukobo.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/econometrics_cheat_sheet_stock_and_watson.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_off0000e764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE764 5448 bytes
SHA-256: c085b638ad16fb5fc20afe50172ce8827dd01e5714138e8fc5dce9d90109f3ce
font_01_sfnt_off0000fa01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA01 10324 bytes
SHA-256: 8635b3b7880e365441b37541f7b08ea6ea8057a4d5e9c9a92ad5d36443d1d48d

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