Malicious PDF — malware analysis report

Static analysis result for SHA-256 368e07c561f27cba…

MALICIOUS

PDF

82.7 KB Created: 2021-01-13 16:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8fa808af5014fe4782a1aa4dad61ed58 SHA-1: 739c157bdf68c330598a1fb93273457e0a048965 SHA-256: 368e07c561f27cba576c93b0dcb4d0cc0a2a01e40e4e71f8dd3642a7bcb2c8ec
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high number of embedded links, with several pointing to known malicious redirectors and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation to drive traffic to malicious sites. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=how+long+does+it+take+to+get+h4+ead+card+after+approval In PDF document text
    • https://rokolumer.weebly.com/uploads/1/3/0/9/130969153/3632686.pdfIn PDF document text
    • https://xogevowizixid.weebly.com/uploads/1/3/0/9/130969953/3511523.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/nukunuraki.pdfIn PDF document text
    • https://site-1172046.mozfiles.com/files/1172046/35188528084.pdfIn PDF document text
    • https://dofafurubes.weebly.com/uploads/1/3/4/7/134762343/patesowoleka_gamorazeduxuvag_zovakabikaxuri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449170/normal_5fd0aa4ebebfa.pdfIn PDF document text
    • https://xekafifem.weebly.com/uploads/1/3/4/6/134669887/tegoxinolamipop.pdfIn PDF document text
    • https://site-1178934.mozfiles.com/files/1178934/namusitobaxavozipogolujo.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/jukoxisojow/bhakti_movement_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/casio_fx-_82au_plus_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/android_floating_action_button_image_size.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/graphic_organizer_compare_and_contrast.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_off0000f4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4FD 5472 bytes
SHA-256: 03588c6e041a08fcec36ab8d0c63698ccc773351db06347dd503b1e563526763
font_01_sfnt_off000107b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B0 11180 bytes
SHA-256: 24061688e2efa9be8d82d90867adb5df84ca22bee9c00bb5114809698f878456
font_02_sfnt_off00012dd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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