Malicious PDF — malware analysis report

Static analysis result for SHA-256 48a3f3100f09d28a…

MALICIOUS

PDF

70.9 KB Created: 2021-03-08 00:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a1686a923d45a0f5cf9f17d79b6cf973 SHA-1: 4a83ff51a1210ad52e9719a0142375cd4fe2eb91 SHA-256: 48a3f3100f09d28adfd8d7e78b185f972514a1c8afeb50cda3d913b7a5f6dd38
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to redirect users. ClamAV detected this file as 'Pdf.Phishing.Trojan', and a machine learning classifier also flagged it as malicious. The presence of embedded URLs further supports the phishing or malicious redirection vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/wix?keyword=mario+party+5+rom+reddit PDF link annotation
    • https://cdn.sqhk.co/pumevigatare/hKJ25gj/the_trip_to_greece_movie_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465269/normal_6032be078f512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366381/normal_5fc6915cb5714.pdfIn PDF document text
    • https://cdn.sqhk.co/xaripisi/ejethdm/jarvis_pro_voice_assistant_app_download.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://uploads.strikinglycdn.com/files/632acb2c-6444-476f-ac4f-80b3425aa7d2/jojafew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe65468-888f-47f3-ac50-b1a26b382e08/fojerapuxolexoxeveba.pdfIn PDF document text
    • https://de2ee6d5-caaa-4265-b15c-40100ab77d99.filesusr.com/ugd/d43733_7834b9591fbc42c2a65c0d5cf88e887b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/filidabut/haida_gwaii_fishing_report_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f5e23c-8921-4279-826a-3ac2268ed59b/74130889670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1073cbb4-da79-41d0-a996-c7bea174148f/69541610047.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_445a04c314b44efdb04cf9476a58bdc6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/31206446747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72de5693-eccd-406c-b58a-07f5b7557702/56037247259.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/tekonsha_voyager_brake_controller_owner_s_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/ascope_pmesii_template.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_off0000cd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD25 4808 bytes
SHA-256: d2d6000886381bb037b14b88082f160e2c70eca36c91b54f02b34ef08348c3e6
font_01_sfnt_off0000dd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8B 10228 bytes
SHA-256: 1f0bb8b3328193de02d8996b92459a8035ca59edf152c1bf8de6c107d9f4f0a3
font_02_sfnt_off00010098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10098 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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