Malicious PDF — malware analysis report

Static analysis result for SHA-256 97bbf442f22ff8f9…

MALICIOUS

PDF

74.2 KB Created: 2021-03-12 10:00:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5f06d11ade08236a488c9cd551d52588 SHA-1: 26232e12abfc510342657671e116d58ca9dcd3ad SHA-256: 97bbf442f22ff8f9f2c7951419b5a0ca1268f6ffddc1164a3fe9bea279e4a110
196 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text related to 'Hotmail sign in', suggesting a phishing or credential harvesting attempt. The presence of numerous external links, including one pointing to 'leonvi.ru', further supports this, as these are often used to host phishing pages or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://leonvi.ru/wix?keyword=hotmail+sign+in PDF link annotation
    • https://suzuxagutif.weebly.com/uploads/1/3/4/3/134352905/1846093.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/5d167bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wufujudisu/guide_vayne_9._2.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/78910698896.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/57433087405.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/vcut_kitle_indeksi_hesaplama_formul.pdfIn PDF document text
    • http://kimatun.epizy.com/32499692945.pdfIn PDF document text
    • http://fezigaf.epizy.com/rujewuseperaro.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/gixesaduboxori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da55f3ba-bc69-434a-b603-3e38e2564317/what_causes_slow_processing_speed.pdfIn PDF document text
    • https://f499a9ea-5579-4d3c-a180-ba191067f9b7.filesusr.com/ugd/34ec99_49ad20956f644c9399a612c504194348.pdf?index=trueIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_b061a679faf046f2825c1851b8d1c514.pdf?index=trueIn PDF document text
    • https://203e7bc3-08d7-4ecc-a8df-f797e0d4a079.filesusr.com/ugd/d4579c_fbdfe2c0b77647bc91af21abb3a18974.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/barsaat_ke_din_aaye_song_audio.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/best_cycling_computer_app_android.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_9807b0c405144c58a7ee5c5c6f9b4c3f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/161376cf-1044-4401-a27a-ca5910ddea49/90366295026.pdfIn PDF document text
    • https://s3.amazonaws.com/padanivozeb/bass_arpeggios_tab.pdfIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_f6445cf94ecf42f6b79c11db7f9ebc0e.pdf?index=trueIn PDF document text
    • http://limuzanesaz.rf.gd/vetipafonelolaf.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_off0000da7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7A 4540 bytes
SHA-256: a6b93ff08badc56df9859a4206f4401fd5778b2d135651ae66b680dd0427913b
font_01_sfnt_off0000e9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B2 10560 bytes
SHA-256: 8830db569ff5ae99733dc3438e656ecd70b5c7971f158d58b767036d1e11b1d9
font_02_sfnt_off00010da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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