Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a9b6cedc53758c…

MALICIOUS

PDF

199.2 KB Created: 2021-02-19 03:15:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e0069015f508c3364f9fb1688d4d25a4 SHA-1: 722c61656d4fc5ea6ac8fdd29f6b344d99ec474e SHA-256: 47a9b6cedc53758c146131493cc8cd945e7c7e1b98b80386371516a0abf6961c
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, one of which is `https://jottigo.ru/aws?utm_term=differential+and+integral+calculus+by+feliciano+and+uy+complete+solution+manual+pdf`, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, appears to be related to academic content, likely a pretext for the malicious download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://jottigo.ru/aws?utm_term=differential+and+integral+calculus+by+feliciano+and+uy+complete+solution+manual+pdf PDF link annotation
    • http://begemot.space/vizaletoxad1vfv.pdfIn PDF document text
    • http://persequen.com/how_to_write_a_case_study_uk2418p.pdfIn PDF document text
    • http://badgesverified.com/kufumerugazavrc.pdfIn PDF document text
    • http://summ-ita.space/amplitude_modulation_experiment_reportnzb4s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_600ce3d7e1bf6.pdfIn PDF document text
    • http://frut-tree.site/gummy_bear_experiment_answer_keysufkd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_60237480d777f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_602f0e0cb3e7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390680/normal_6002af06a88c0.pdfIn PDF document text
    • http://catsism.com/gawovagurejuvaxazede0ka2n.pdfIn PDF document text
    • https://cdn.sqhk.co/dusaradezat/KigOghy/92737871092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_601e4ca692872.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/EghicG0/53192806366.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/2485352.pdfIn PDF document text
    • https://cdn.sqhk.co/rolileduvof/jcj5gg0/d_music_app_download.pdfIn PDF document text
    • http://vashastrahovka24.ru/6813562961s861p.pdfIn PDF document text
    • http://3bureaureport.info/rebomajuwexe1vdyz.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/gotenukevepunin/81209362555.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_off0002c253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C253 5716 bytes
SHA-256: 587afd072d3f5dde82dda39ea4b62295ea2a90552ad98c77942873b0d06a2349
font_01_sfnt_off0002d5c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5C0 17976 bytes
SHA-256: 44a313bd1b91744a0beb5d136f50c022a8e07790f8b9ff78d04c6da1b2a8242e

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