Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e2015018e7be1f…

MALICIOUS

PDF

74.8 KB Created: 2021-03-23 23:59:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b5ce503279f4ffb4799e0222c41e995 SHA-1: 2117e961fba090e9fd5a4885c7dd6b79b68c7b55 SHA-256: 12e2015018e7be1f960b1c7e6713cf2412603c64f93da1476b2ab6673e027df9
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'https://zajinet.ru/wix?keyword=the+tangent+ratio+study+guide', which is likely a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of external URIs and the overall detection suggest a phishing or credential harvesting attempt, potentially leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/wix?keyword=the+tangent+ratio+study+guide
    • http://xiwakaravivomik.scienceontheweb.net/definition_of_international_accounting_standards.pdf
    • http://ruwufuwetoj.mygamesonline.org/3032524442.pdf
    • http://lelazuw.iblogger.org/how_to_clean_kenmore_800_washer.pdf
    • http://suporefebakibur.mygamesonline.org/jezabezurulatet.pdf
    • http://zujejilolo.scienceontheweb.net/17388537040.pdf
    • http://gepokupaburorew.mywebcommunity.org/abordagens_psicolgicas.pdf
    • https://static.s123-cdn-static.com/uploads/4444356/normal_5fe43e52c652c.pdf
    • https://cdn-cms.f-static.net/uploads/4417212/normal_6035225bf3166.pdf
    • https://cdn-cms.f-static.net/uploads/4403127/normal_604732bc9b606.pdf
    • http://jepewadagamer.scienceontheweb.net/oreck_xl_canister_vacuum_cleaner.pdf
    • http://bagawixaj.mywebcommunity.org/1812347525.pdf
    • https://cdn-cms.f-static.net/uploads/4477916/normal_604b86fe904b1.pdf
    • http://dakisemakegag.sportsontheweb.net/9114046734.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_457da33a94644f148ebed90934c07431.pdf?index=true
    • http://bepapogijarepub.rf.gd/8563943441.pdf
    • https://6739ca04-605d-4ff4-b4c9-4e5bd75a7819.filesusr.com/ugd/031dda_c210e64b4f55430f8c1572c44f33e110.pdf?index=true
    • http://kutoduno.rf.gd/classification_of_living_things_worksheet.pdf
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_c470e2df8f3841f4be5ffe7848ee8869.pdf?index=true
    • http://gemimixobisuju.epizy.com/pewopobakonadelupu.pdf
    • http://tupesom.atwebpages.com/95808128968.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e587.bin
7aed2f131c57d3f16dffea53103b5bc5705037d2e28694d23a8f2742c74d03fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE587 5104 bytes
font_01_sfnt_off0000f6e2.bin
0e3d6ebc552917b777701479d84e280d74b4577a19bd47bbea7dd0797c560c0c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 10932 bytes