Malicious PDF — malware analysis report

Static analysis result for SHA-256 210c1a517f306659…

MALICIOUS

PDF

82.5 KB Created: 2021-02-24 08:03:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a0d8b517036db7efc35f98f4c777729e SHA-1: 8a6edf7ed3efd4879426360f895e629f3ef460cc SHA-256: 210c1a517f3066595c605d0ec326e06111a1f50037fc337043f0eb126d78bce5
214 Risk Score

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The embedded URLs suggest an attempt to direct users to potentially harmful websites, possibly for phishing or to host further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/wb?keyword=prayer%20books%20rs3 In PDF document text
    • http://simcars.ru/lesotununerinowigun696f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_601b1d4fda6b5.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/8d42f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_6028eb9694e8b.pdfIn PDF document text
    • https://sekinejifupom.weebly.com/uploads/1/3/5/3/135350217/ruwabigegoxopam.pdfIn PDF document text
    • http://getporte.xyz/cisco_switch_vlan_configuration_commands6uxrv.pdfIn PDF document text
    • https://kizofirelurok.weebly.com/uploads/1/3/1/6/131606598/zazoxobawabaximuwes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489259/normal_5fed1c9b80292.pdfIn PDF document text
    • https://kopezufotixese.weebly.com/uploads/1/3/1/1/131164020/rotoxaf.pdfIn PDF document text
    • https://jatakusikafe.weebly.com/uploads/1/3/0/7/130776866/fosam-loxax-kinanatixuz-rilewufasirin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403274/normal_6000927be474d.pdfIn PDF document text
    • http://itwow.info/aditya_hrudayam_tamil_song60lh4.pdfIn PDF document text
    • https://kalozepi.weebly.com/uploads/1/3/0/8/130814360/dapidotelumokemuteb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/degagaziv/71940226885.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/kulipabi.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/westinghouse_tv_remote_rmt-24.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/bol_chudiya_bol_kangna_audio.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_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 5116 bytes
SHA-256: b7eb5c0ba5fbfdf8df05fcbc53da2e1e390abb5d87163a3b79f1df6df0637aff
font_01_sfnt_off0000f359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF359 3356 bytes
SHA-256: 023b4255c096ec1ea3116a38b715ae518077ca571dd8df7885ae87894c519328
font_02_sfnt_off00010122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 11308 bytes
SHA-256: 2c102b43d0a8ba916dbbc123ec735cca2c31629d8b7c3fbd12c088f3db01dd5f
font_03_sfnt_off0001277d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 16164 bytes
SHA-256: 3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994

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