Malicious PDF — malware analysis report

Static analysis result for SHA-256 29b787b600d6b98e…

MALICIOUS

PDF

79.5 KB Created: 2021-03-19 15:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30ccfe6fde4435fbeb64b0e8b939c308 SHA-1: 1d93977a420eb0f8dd34001e374635ebe3a0b4f7 SHA-256: 29b787b600d6b98e406677e872e6017b796fdb370e52c523b1b9eaf44330ba69
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The presence of a large number of external links, identified as a PDF link farm, suggests an attempt to manipulate search engine results or redirect users to potentially harmful content. While no scripts were directly extracted, the PDF structure and numerous external URLs indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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-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://xajibur.ru/award?keyword=possessivpronomen+%25C3%25BCbungen+pdf+a1
    • http://xiwasaruv.66ghz.com/case_study_report_example_nursing.pdf
    • https://ziloxewimufe.weebly.com/uploads/1/3/0/8/130813797/696217.pdf
    • http://tejovotemikodes.getenjoyment.net/panasonic_viera_television.pdf
    • https://zivibesojosilit.weebly.com/uploads/1/3/5/3/135304262/gopaluzafoj_kesonuronigo_webifaturo_todoto.pdf
    • http://tixshopclub.space/21663990719xufw7.pdf
    • http://kugewezebuvigiw.mygamesonline.org/oakley_jawbone_price_philippines.pdf
    • http://supernefritroller.xyz/89090000129g32n6.pdf
    • https://tanorejenajid.weebly.com/uploads/1/3/1/0/131071151/4543624.pdf
    • http://com-signto2.xyz/segewagifajopixz82t.pdf
    • http://folobataxo.iblogger.org/phn_mm_convert_sang_nh.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://gozenabuzixi.onlinewebshop.net/gordon_ramsay_ultimate_cookery_course_app.pdf
    • https://41c240d9-b4af-4f88-8fa4-2a41cce3a287.filesusr.com/ugd/01bc73_39cb49affdae4a1895afb7bb729b4791.pdf?index=true
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_1cbf7314f3d34bfd86b06b79a539ede0.pdf?index=true
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_547e540a6ca84a449fa62be2f3079254.pdf?index=true
    • http://fepusum.onlinewebshop.net/97135354894.pdf
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_a1ed85826bff491885be5c4b87bf3d70.pdf?index=true
    • http://givaneja.rf.gd/50499770322.pdf
    • https://183df7f2-4185-4ca0-bfcc-33b39bc842f1.filesusr.com/ugd/9ac34a_46efa426cc584dff9836e08c98dbdca4.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2b.bin
69d8257ae7265f8c569ad79da81440b388ce43620b15728b0debb87004319e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2B 5704 bytes
font_01_sfnt_off0000f153.bin
d99eb90bb9e805786e940bb441a04b4c2d23e69f07176a683a6142bb6cf81c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF153 12508 bytes
font_02_sfnt_off00011963.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11963 16204 bytes

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