Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff947f604989564…

MALICIOUS

PDF

73.8 KB Created: 2021-03-27 12:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22746bed01c140dd839df4bfd3f34a62 SHA-1: ee69539833ad9137dc823119f49697b3b5c4cf87 SHA-256: 1ff947f6049895640c7876b2e34b42a5f96be7724892599bcc3ddd55693720dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to PDF files hosted on file-sharing services, indicative of a link farm or phishing campaign. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly suggest malicious intent. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://soxebez.ru/award?keyword=engenharia+genetica+livro+pdf
    • https://witomoniwitu.weebly.com/uploads/1/3/5/3/135317652/butanig.pdf
    • https://fejajeger.weebly.com/uploads/1/3/4/6/134614243/472250.pdf
    • http://tikanaw.mypressonline.com/tamarabodo.pdf
    • http://kazexezawulozij.mypressonline.com/is_the_arc_trainer_good_for_glutes.pdf
    • http://bolawixefop.mygamesonline.org/42871757421.pdf
    • https://static.s123-cdn-static.com/uploads/4479932/normal_6006af4d65200.pdf
    • https://zurukuwimuso.weebly.com/uploads/1/3/4/3/134325804/fe3e44d7986d.pdf
    • https://static.s123-cdn-static.com/uploads/4388173/normal_5feb795a98f1e.pdf
    • http://mimudobaros.22web.org/how_to_crochet_a_granny_square_left_handed.pdf
    • https://xulozajewe.weebly.com/uploads/1/3/1/3/131384688/xezidubap.pdf
    • https://cdn-cms.f-static.net/uploads/4406466/normal_6017a67e12399.pdf
    • https://luwuruguvuwotom.weebly.com/uploads/1/3/0/9/130969706/nupagume.pdf
    • https://zadilomevesijob.weebly.com/uploads/1/3/4/5/134581884/xiveguveg.pdf
    • https://dixoparogazasa.weebly.com/uploads/1/3/1/8/131871726/28049e287e.pdf
    • https://wugepugozufov.weebly.com/uploads/1/3/4/7/134744675/4216434.pdf
    • https://cdn-cms.f-static.net/uploads/4412387/normal_603bc67cb2644.pdf
    • https://juxapokidopelif.weebly.com/uploads/1/3/1/6/131606881/5eb0024435f98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_f5382d6f510141d496679dbc407f1961.pdf?index=true
    • http://gibidapasajug.atwebpages.com/bivado.pdf
    • http://favamolutamugiz.rf.gd/22318225236.pdf
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_0452551bc325427ebac4388119e81361.pdf?index=true
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_2b260cc97a8747258586cfaa7562f5a9.pdf?index=true
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_2bd8edc10b2046f2bb6c3df0297206c9.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d133.bin
0aae1fb5980da7032c0abec39e3a4ea00d1d158551e98982cc2ecfa6091faedb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 5044 bytes
font_01_sfnt_off0000e258.bin
9b46172227992da7be7c874e90c6bea17a365196bafef744ca6fd8562df21974		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE258 13052 bytes
font_02_sfnt_off00010a09.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A09 4324 bytes

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