Malicious PDF — malware analysis report

Static analysis result for SHA-256 0958c42a46198a2a…

MALICIOUS

PDF

74.0 KB Created: 2021-01-07 20:50:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 050457dad8f8f754951981fe0262e388 SHA-1: 9d0750b37e5ee54059e93e41a1542e4243356fa5 SHA-256: 0958c42a46198a2a1bff23553b5e86c736bd7d43f0cd292037ad2a8b0ec32fb4
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic firings indicate a link farm designed to distribute malicious content, likely through phishing lures. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect the user to malicious infrastructure.

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=tutorial+arcmap+10.+3+pdf In PDF document text
    • https://sosegesidor.weebly.com/uploads/1/3/4/4/134465043/rapikisanapik.pdfIn PDF document text
    • https://savijuwopezego.weebly.com/uploads/1/3/4/4/134464024/pitonuso-putoduxupevoked-muzifeni.pdfIn PDF document text
    • https://cdn.sqhk.co/jizuxadif/jdia3MZ/napipikedawede.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/womikesenavujo.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvojeve/1uYhfib/supermarket_mania_journey_mod_apk_revdl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/49443108-dc14-4cde-a6eb-cccb6fe017f9/powerflex_400_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e89c8f59-473c-48fb-aa57-412592340c98/bugadapelejixagawasifif.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/brochevarevarura_telugu_movie_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e62ff2e-ad50-44a9-9317-5135c1e129e7/pet_attitude_scale.pdfIn PDF document text
    • https://s3.amazonaws.com/fuzafuzeruwit/cimb_principal_malaysia_equity_fund_fact_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3601cabf-e193-4499-819b-b112c1d2185c/pebijojawekarozum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9c19afb-9182-470d-8738-5d81514cebf6/dove_and_grenade_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec465be-ab8b-4dc3-ab79-d2860d885f1a/perimeter_and_area_of_triangle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/king_of_fighters_99_move_list.pdfIn PDF document text
    • https://s3.amazonaws.com/bitizopovopaso/madevum.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/rimapobavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf7cf93-27ea-42ff-b2a2-aee1bd167bdb/tipler_6th_edition_solutions.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_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 5464 bytes
SHA-256: f03a06bf625ad8f5cbf254e05c85f90a2fc202a43129ba64fbea7e7847309cd8
font_01_sfnt_off0000f9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 9788 bytes
SHA-256: 3702752f07107782af7a6c6393c7b59f5108e0f350e26387ebe1cad3b2346ed8

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