Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d286db926e4654…

MALICIOUS

PDF

69.4 KB Created: 2021-03-09 12:36:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 815035977b90ae8c007d50b439f4010a SHA-1: bd8e9a3591034f400586e43b438568f9508d6da2 SHA-256: 67d286db926e4654e351f5f9d3efd1cbf8066b73321ab0d55f9af9d385f2c6c2
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 attempt. It contains an embedded URL that directs users to a suspicious domain, likely to host further malicious content or phishing pages. The document body, though heavily obfuscated, suggests a lure related to a 'US history staar test 2017'.

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://maypoin.ru/wix?keyword=us+history+staar+test+2017 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445557/normal_5fc86d3fafec6.pdfIn PDF document text
    • https://cdn.sqhk.co/lowilufape/ajcjiii/19765712697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fceb58b7ba32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393889/normal_5fe118008b1fd.pdfIn PDF document text
    • https://cdn.sqhk.co/jekurona/jRWiiaw/95057906859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5ff4a64cbd386.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/ohjWhbr/hello_dolly_movie_poster.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387060/normal_602c116e8c422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381547/normal_5ff1d08cf2740.pdfIn PDF document text
    • https://cdn.sqhk.co/xabovalizo/difgffm/gavazotaveval.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_5fe804c08deb7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_6004be3e6bb8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_60213ef88572e.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/e3c85dd3-17f8-4387-8285-669c37255b78/recaro_booster_seat_review.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/vebakopasilamomugufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437b120b-55c0-45d1-95fe-0fc71e3bff69/zipavokixako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ff2dec-40c6-47ee-9d73-6b42d4957e17/gekiwanexada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bbb9c30-cc22-4009-898e-7426a37f424d/54840588148.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/35945836318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea22a995-5f02-4db3-921d-639cff77206c/best_rated_vent_free_gas_logs.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/canada_passport_photo_size_template.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_off0000d316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD316 5240 bytes
SHA-256: f283a796a412d7caeb1b32f2e6a92a1768ecbab1697af14f9e6844a001d53aa0
font_01_sfnt_off0000e4f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F2 10436 bytes
SHA-256: 03c34398c1ff7a4463800fc31071eaa0e8c6055164984999be2302fa77a89d4b

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