Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b113f7927bd7b2…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 08:17:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f40e25a0df7dcd08e31daa38b6157829 SHA-1: d24a9d5fcb6485c591fdb81561b71a622092e597 SHA-256: 01b113f7927bd7b2b1ce54f2fe147877143b9499d19d6ba4663e569b9fcb5029
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search results or distribute content. ClamAV also identified the file as 'Pdf.Phishing.Trojan'. The embedded links are the primary indicators of malicious intent, likely serving as a lure for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/123?utm_term=introduction+to+business+law+textbook In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420599/normal_6015f4b16ed32.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/adp9Tjg/download_nerf_epic_pranks_mod_apk_unlimited_money.pdfIn PDF document text
    • http://govugododuwo.iblogger.org/arduino_programming_book_in_hindi.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/4b73089cdcf00.pdfIn PDF document text
    • https://junerokiwoji.weebly.com/uploads/1/3/0/7/130775834/6e02e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415302/normal_60279a6d3bc75.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/hpdjg43/xajofozun.pdfIn PDF document text
    • https://gawobomune.weebly.com/uploads/1/3/5/3/135317514/lokiguwowutug.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/fjcQifi/gartner_magic_quadrant_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pusuvizodez/xgfjfij/smart_tv_best_buy_open_box.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/gotitibekovi/binodawiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/40545477979.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/how_much_does_a_dixie_chopper_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/how_to_make_easy_tissue_paper_flowers_step_by_step.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/pamowufafoxomanusupot.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_off0000d9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 5236 bytes
SHA-256: ccde82578455db9a0ae583bcef7e87a60a0a415e5d8248f77c8370293e182299
font_01_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 10816 bytes
SHA-256: 8474eb796b8251be7855feb6bcb2a8e667391278ae43cbbc9c67f5f0ea917909

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