Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f61304aa95e112b…

MALICIOUS

PDF

65.2 KB Created: 2020-12-03 22:33:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6e96b897d96222fc0dee000811d52603 SHA-1: 13c0199724f8f2576c65726751248f784f9c073e SHA-256: 7f61304aa95e112bbb2be47243c83d47dabca147f6473d87eb425b3b5163bd7d
214 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a shopping-related query parameter. It also exhibits characteristics of a link farm, with numerous external PDF links. While no scripts were explicitly extracted, the presence of malicious links and the ClamAV detection strongly indicate a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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://ggtraff.ru/aws?utm_term=bridal+bed+sheets+online+shopping In PDF document text
    • https://wokenapojazud.weebly.com/uploads/1/3/4/7/134753840/lorikikape_nuwutaduli.pdfIn PDF document text
    • https://wuriwodek.weebly.com/uploads/1/3/4/6/134688082/856fe354a.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/5fbf4d606457125654310c48/1606372705148/wowovalet.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/xijomer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc115d62bbd7406580792b0/t/5fc12db5a97599144e21cfd5/1606495669837/cannabis_calcium_deficiency_in_flower.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/dilerarala.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/nonatab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14f4aa13a450babf6e3a6/t/5fc4cbb418e72e5fdb6f35f2/1606732725830/15532182249.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc144dc68612547ed60a5eb/t/5fc2a8763570fb44d15a16fd/1606592631306/woniz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6b7d7acac6192ab97339/1606380414056/kewalo_basin_harbor_places_to_eat.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/istanbul_travel_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/guilford_county_nc_register_of_deeds_vital.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/89044863226.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd06b42edfcd2bda92a980/1606223541228/trolley_stop_new_orleans_yelp.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_off0000c13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13F 5408 bytes
SHA-256: 7ab7cdb2f1cc52b8c5d8c97c0834279c63a1c062a701767c71d90504b843b658
font_01_sfnt_off0000d38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38F 10756 bytes
SHA-256: a38508547cbf3299694294a0faebcaf2724e8b217d9ffcbcbb4b2eb02aadadaa

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