Malicious PDF — malware analysis report

Static analysis result for SHA-256 623eda3cb803ecc2…

MALICIOUS

PDF

87.9 KB Created: 2021-03-09 09:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: efdf369172b57cedc875b6bab11c4c08 SHA-1: 745d819f4010de038eab2d0e97b7eabc1a03caaa SHA-256: 623eda3cb803ecc2d1d3e6333aa06490c4f4d766aaef4ee25f46a162fc0e5b7a
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a domain that appears to be part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=edgar+allan+poe+libros+pdf+corazon+delator
    • http://stonersfranchise.com/fufibesobuwikopexugozhpsp.pdf
    • http://www-sfr-fr-monespace.com/80s_movie_quotes_trivia_questions_and_answerswgg5k.pdf
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5fd1b9b967cac.pdf
    • https://cdn-cms.f-static.net/uploads/4415525/normal_60430363be6a3.pdf
    • http://itawegan.fun/gta_5_premium_edition_ps4_cheatsycztj.pdf
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6018452c4a59b.pdf
    • https://static.s123-cdn-static.com/uploads/4387430/normal_5ff09e61bd0bd.pdf
    • http://baranaydin.org/zidanizufapudiduvikiluk85cof.pdf
    • https://static.s123-cdn-static.com/uploads/4367617/normal_6002770901388.pdf
    • https://cdn.sqhk.co/fuludasowipu/gidijbc/download_games_war_gears_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4389571/normal_601a71747e5aa.pdf
    • https://static.s123-cdn-static.com/uploads/4478670/normal_5fffaeefa7fe6.pdf
    • https://cdn-cms.f-static.net/uploads/4457000/normal_6034facac5578.pdf
    • http://aires.fun/zexusubosax2n1.pdf
    • https://static.s123-cdn-static.com/uploads/4384831/normal_5fe2c51dba25a.pdf
    • https://cdn-cms.f-static.net/uploads/4503874/normal_601b22018798b.pdf
    • http://fakixigulidol.mywebcommunity.org/75607700852.pdf
    • https://cdn.sqhk.co/mikoduper/baKjdhh/59608271640.pdf
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fd3cc0f6db70.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lexekuduwowig.atwebpages.com/contabilidad_de_costos_carlos_fernando_cuevas_3_edicion.pdf
    • http://zegetafirotazaz.atwebpages.com/dejutil.pdf
    • http://zowofiz.myartsonline.com/is_financial_modelling_course_useful.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_off00011b13.bin
21373c32bd608f9d40856b663e41a75cae482da8a840a9a63f8d2b5d756f2497
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B13 5468 bytes
font_01_sfnt_off00012dc3.bin
4cec3d7bc3b12e5546cc5b0a788930db29fd4c38ca0ece1d6a740e163f76a3a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DC3 10624 bytes