Malicious PDF — malware analysis report

Static analysis result for SHA-256 07c3f6824f1b8ca5…

MALICIOUS

PDF

83.8 KB Created: 2021-01-09 01:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3d5a33df199ec098a7d88ce2e7794b37 SHA-1: f613e69e514ed2c9bcafe03e5bfa9a5567bee123 SHA-256: 07c3f6824f1b8ca5b9e6ca280e059f68fb5ac399cae5115cec887e2813a2d3cb
214 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF documents, suggesting a link farm designed to lure users. One critical heuristic identified a link to known malicious redirector infrastructure (ggtraff.ru), indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support the malicious nature of this file.

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/123?utm_term=truy%25E1%25BB%2587n+c%25C6%25B0%25E1%25BB%259Di+ng%25E1%25BA%25AFn In PDF document text
    • https://cdn.sqhk.co/voduzetefir/iVidgjO/heart_touching_teachers_day_quotes_in_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/tozimozeka/hexOsha/blocky_car_racing_apk_indir_club.pdfIn PDF document text
    • https://mizunilido.weebly.com/uploads/1/3/4/3/134352057/pamimubaleta.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/JdhdghL/multi_stream_transport_mac_os.pdfIn PDF document text
    • https://cdn.sqhk.co/dalegoti/jayZMie/flippy_knife_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwagezo/X3piahd/bukuvoziwenukipusesuziriz.pdfIn PDF document text
    • https://cdn.sqhk.co/nizolurinidi/O9TggOy/streamlabs_alerts_not_showing_in_obs.pdfIn PDF document text
    • https://cdn.sqhk.co/wusuzevomo/jfAnggZ/80329955952.pdfIn PDF document text
    • https://cdn.sqhk.co/silutoge/ggchjjd/projecty_rts_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/ancient_greece_webquest_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/028b1861-581c-4102-8642-1c7f9855edf9/93961694544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d251c971-27cd-462d-ab82-54fe3e5bd668/watuz.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/texuripinulibogoxajafuge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20922821-f656-457a-be59-ac65dd70629a/dotuwuxogaduxod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89b6f51-9a30-41e2-b2a3-20970d4b27ca/que_necesitan_las_plantas_para_vivir_y_porque.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED80 4928 bytes
SHA-256: b5e6f789619bd0a10a08b508fbbdf5d2ff4a97322b7cd83cdb9e05a0bc33974e
font_01_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 23424 bytes
SHA-256: ac48449c6affa911dd33ede2af3c1e2f54bedd6ac757f913c7cf0c167c3523ed
font_02_sfnt_off000131f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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