Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95cd21e7b6b5b04…

MALICIOUS

PDF

63.4 KB Created: 2020-12-09 21:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 2df5583d062cf3872ed67c88c81e79ad SHA-1: 7267bf229543e312b297acab1504419755413a9c SHA-256: a95cd21e7b6b5b043a6bc9271305ae16f7909ce267e8884d2933367173596d83
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains a significant number of embedded URLs, many of which point to redirector infrastructure or potentially malicious content. Heuristics indicate it's a link farm and a redirector, suggesting its primary purpose is to lead users to malicious sites. ClamAV also detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffmen.ru/aws?utm_term=radio+times+tv+guide In PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/f03f5f4bb1e523.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/5fc289d2116eb00e3c565727/t/5fc83e4a7ff5a343ebee4113/1606958669780/neon_spider_rope_hero_vice_town_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/xabodo.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/fawixosutoxususase.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/sutupoberawolagozuris.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39d206b97992eb56cd759/t/5fc9d2652f5dbb44b77d0cc5/1607062117734/watch_face_premium_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/steven_holl_fukuoka.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/65314374928.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/battleground_warfare_mod_apk_unlimited_money.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/mapquest_directions_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/jubevopufupenapubume.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/mysql_commands_in_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/gideruzeze.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/risk_matrix_example.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/greeting_card_template_ms_word.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_off0000bc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC50 5084 bytes
SHA-256: ff3c536916ec3e31de0a9683fc0d0faa31762d6f55145a7190623e381f727a19
font_01_sfnt_off0000cd9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD9F 10280 bytes
SHA-256: 7c98a302dee028ecd9a29dd2cc5b3b2126f311b6032432d8481f3203000be36b

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