Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e768916eba9ca4…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 02:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 52851af6f1bc83ebb8235d9fd43226c5 SHA-1: 10b254998437d7f2c4c0cddf57cba8cd08591593 SHA-256: e6e768916eba9ca4bc3ba2e297a166ddcda374890fb00255cef540d9b862eeef
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://golowaki.ru/strik?utm_term=kiss+the+rain+easy+piano+sheet+music+free PDF link annotation
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/jovakewapufozubej.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/eqHFjet/bmx_bike_race_apkpure.pdfIn PDF document text
    • https://jodalutuz.weebly.com/uploads/1/3/4/4/134444421/gulififomixajome.pdfIn PDF document text
    • https://bejasesazopo.weebly.com/uploads/1/3/4/5/134512805/433ccedf1bf2917.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/tevibipaburujokir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5ff6807018b1f.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/M4jhTJo/archery_set_for_kids.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493227/normal_5feba1255d17f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f6b99bba-f064-431f-ab68-6eacb91b2703.filesusr.com/ugd/35e1ce_e9e63572ef444304a367fa4f5d1b5960.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mokamoba/murokid.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/shape_pattern_worksheets_for_grade_1.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_ba3ddc89db2842ecbbf099b0417bf38c.pdf?index=trueIn PDF document text
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_e782c673c13f4479a61d7c21e1b465ff.pdf?index=trueIn PDF document text
    • https://369206df-e466-4f8f-9771-850d1edb33c5.filesusr.com/ugd/8fd5dc_120ecbba2f52410c914373854e66b6ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapelu/application_format_for_seeking_permission.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/86123619172.pdfIn PDF document text
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_a2904bb0c6774086ad1acffbbc6517e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/35905138116.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/photo_collage_art_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/lg_error_code_ch_29.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_off0000e65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE65E 5292 bytes
SHA-256: 307c17d18cf703dd99b01a5b042738c8e54b0c3b795d06fc56c421386f3d970c
font_01_sfnt_off0000f847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF847 11532 bytes
SHA-256: bfe44e8f65d9abc591ca0a3daaae14af7a726ee4c3b2e334da6f8ccd316c705f

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