Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52f626a0568db35…

MALICIOUS

PDF

85.9 KB Created: 2020-12-09 20:42:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 00ac2eeb873ea3bc9a5fa9664d9a1cc6 SHA-1: deb49b9bfdcfaa9765a08927a3222298c220dec6 SHA-256: c52f626a0568db3592045769822d5fc3fef3d02611a37d8e48494337a91804bf
214 Risk Score

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffmen.ru/strik?utm_term=springboard+geometry+answers+pdf+unit+3 In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf50334f98375720d6dbdc/1606373428448/serial_crack_sites.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2979f7848ba205d236332/t/5fc3d07f2dd96f591862b609/1606668418809/59106169111.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf52fb7acac6192ab78db7/1606374146356/33352903190.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c67840f1034a5ca82603/t/5fc0f430f8cdb769c6050dc3/1606480944945/how_to_earn_77_fast.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0de5bcb0228a282afe8/t/5fc1361e5147b148045f8640/1606497823296/city_island_3_mod_apk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52d2ebe9b69395126b4b8/t/5fcf49ef24ae147ef3da861c/1607420401898/wejopenadem.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/tovegigikaxe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f2f6c89e1c4b8fbea157/t/5fc16b6161e25426e16dc6b6/1606511458373/feferi_peixes_skirt.pdfIn PDF document text
    • https://s3.amazonaws.com/jejulurowev/798508023.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/written_statement_hr.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/rerabisorirazexutato.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/online_translate_language.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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_off0000e93d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93D 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 5932 bytes
SHA-256: 226ed66d6bde170196400e3abc1d93efc17a740060d54dd7dd9fed498b2f6d19
font_02_sfnt_off00010d60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D60 11792 bytes
SHA-256: 773e0ea4169d3c9f7ad227fbae32b425f02ee1b3696a44ee759925db16b41c70
font_03_sfnt_off000135c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C8 16036 bytes
SHA-256: 354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb

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