Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e12ea3601e477ad…

MALICIOUS

PDF

78.8 KB Created: 2021-01-29 12:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3111bb151db2b968c0ba359f844b32db SHA-1: ee0c2a7bec028b83e0823243cb86edd8c96e955e SHA-256: 4e12ea3601e477adf99ecad246b137ecffe7e7d7ac277991c8fcf29406d63af8
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. One prominent URL, 'https://trafffi.ru/wb?keyword=beard%20photo%20editor%20apk', suggests a lure related to software downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/wb?keyword=beard%20photo%20editor%20apk PDF link annotation
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/laxajisifawatoxelil.pdfIn PDF document text
    • http://gloslides.com/hotspot_apk_free_downloadtikui.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/pgjymor/22728796673.pdfIn PDF document text
    • http://sweetmeet.online/the_sociology_project_2._0_freetc971.pdfIn PDF document text
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/4489978fddd50.pdfIn PDF document text
    • http://nominasacra.ru/pocket_warrior_modp3ux0.pdfIn PDF document text
    • https://toruganaduloxo.weebly.com/uploads/1/3/5/3/135347606/1124179.pdfIn PDF document text
    • https://vepibasizux.weebly.com/uploads/1/3/1/3/131380915/funixakisesaw.pdfIn PDF document text
    • https://cdn.sqhk.co/ganidabizi/9icgdXB/ates_ve_su_gorevimiz_tehlike_2017.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/tiluwisulepam/17080104095.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/seismic_monitoring_in_mines.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/zipoxedukuduk.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/appareil_digestif_cours.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/dragon_ball_android_13.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/dynamodb_putitem_mapping_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/zagowumavunugevaruv.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 4632 bytes
SHA-256: 1c6be91ef324601e0115aeb56afb5f141ad8fd7ce1766d04f6d39b83eb88c685
font_01_sfnt_off0000e72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72A 10412 bytes
SHA-256: 08184d8386963064dc57d66eede259c78399678106b805e7ac43c8d019b872e0
font_02_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 16092 bytes
SHA-256: 0be84d2d0547f1f02aa0071b49020aaa73ac7e6a4c4dee27a4da8627c6f2d0ef
font_03_sfnt_off00011fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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