Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9f8fbd3ae06fb2…

MALICIOUS

PDF

50.1 KB Created: 2020-11-09 01:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 104937359e49ecbf3e4e61b17beec96f SHA-1: bf863d886a89482b370de8e0b946e30d112531a0 SHA-256: 2e9f8fbd3ae06fb27aba160c0256040294c245f1d3035654fc6e92c9b40a2a16
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The document body also contains a URL that points to a potentially malicious domain. The presence of numerous external links suggests a link farm or redirection attempt, likely to deliver a secondary payload or phish for credentials. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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?keyword=new+orleans+calendar+march+2020
    • https://revokaraso.weebly.com/uploads/1/3/4/3/134320841/9232631.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7dc3b1ac-ad91-45f6-be6f-5e4b3adf0810/application_form_for_girlfriend_funny.pdf
    • https://s3.amazonaws.com/subud/tidilozupowikika.pdf
    • https://s3.amazonaws.com/zuwosil/basketball_legends_game_halloween.pdf
    • https://s3.amazonaws.com/degisapemifa/building_skills_for_the_toefl_ibt__2nd_edition.pdf
    • https://uploads.strikinglycdn.com/files/64b18214-90b1-42ed-b47e-d3a802392edc/37006841371.pdf
    • https://uploads.strikinglycdn.com/files/e42913c9-1269-4f32-ba1f-734d00bf06d1/85893372800.pdf
    • https://s3.amazonaws.com/susopuzupure/lipid_profile_file.pdf
    • https://uploads.strikinglycdn.com/files/cd299566-3b70-4819-a665-157501704357/d_d_heroes.pdf
    • https://s3.amazonaws.com/sugaguxagu/68337733817.pdf
    • https://uploads.strikinglycdn.com/files/c212f6df-72fc-43af-a0c5-e19e88585299/21882374053.pdf
    • https://s3.amazonaws.com/susopuzupure/xejebofipetonu.pdf
    • https://uploads.strikinglycdn.com/files/33c09aec-a353-45d0-80f2-45640e8ae272/begijusopewegekubopewem.pdf
    • https://uploads.strikinglycdn.com/files/635f54de-db56-4b28-a4cb-7e62831daa7a/student_led_conference_forms_kindergarten.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076e0.bin
fbb898a8e721664b193f5fffe7a931344309c756780c6f335779c0a6fe66a5e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76E0 5172 bytes
font_01_sfnt_off0000884a.bin
4373b1de25fc5106cf85d637c9a1203057c01042b50db1733d9caa9b0da56e84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884A 10948 bytes
font_02_sfnt_off0000acd6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD6 4324 bytes

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