Malicious PDF — malware analysis report

Static analysis result for SHA-256 61fc4a10193dfffb…

MALICIOUS

PDF

90.9 KB Created: 2021-03-12 00:46:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6b7956fb114a7b02d3fd15711cc3417f SHA-1: 99edfba81e97c5a07c7dc3fc6add49fca9a2f1cb SHA-256: 61fc4a10193dfffba44d216daceb591e5a1ec07a19af69352dc68b1e5f4e933c
96 Risk Score

Malware Insights

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

The file is a PDF document detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The document body is heavily obfuscated, but the presence of external URIs suggests a phishing or credential harvesting 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://fokemale.ru/strik?utm_term=aristotle+metaphysics+book+2+summary PDF link annotation
    • http://wilidelefuguki.22web.org/wii_original_release_date.pdfIn PDF document text
    • http://nunedosigiruros.22web.org/fetal_growth_restriction_rcog_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409405/normal_5fc951fe0ab9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459469/normal_5fcbd7dc9fbeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476429/normal_600770135e5cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_60444c10d5528.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/macbeth_agustin_garcia_calvo.pdfIn PDF document text
    • http://xagakojitogiva.getenjoyment.net/apollo_twin_duo_mk2_review.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/benuka/cisco_attendant_console_standard_12_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/top_android_phones_2019_under_20000.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/51531408532.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/59728443404.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/50646512521.pdfIn PDF document text
    • http://salajire.onlinewebshop.net/42924520198.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/chemistry_book_class_11_bd.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/2911074980.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/waec_chief_examiners_report_on_mathematics_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/tumuzu/71949327558.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/28050973082.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11012 3208 bytes
SHA-256: 5e550024c0039b8314c6c3ebb79e8d21fd47fba346157369c5d3d1c527c3b0eb
font_01_sfnt_off00011b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B83 5600 bytes
SHA-256: 3f4ab6011bc09a856b489e3edbb4fd9a845890feda7648481e0cc2262bdf444d
font_02_sfnt_off00012e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E66 14428 bytes
SHA-256: 29991aeccdf56f1923b1cb9011429c0433fb4bf14637ffbfe773fb0f6f66e931

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