Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aece80d8516bc0d…

MALICIOUS

PDF

79.5 KB Created: 2021-06-13 04:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 37d970e9aab42f697a10f1211b9275b3 SHA-1: cd1e57bd664a9a261695d4386141bbdeb30c77ca SHA-256: 3aece80d8516bc0d740474050eb6bbd3cfec0f65f2668d7e0cd5342c942fa83c
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URL that redirects to a domain associated with potentially malicious activity, disguised as a document providing answers. Although no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to direct the user to a malicious resource, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/pbw?utm_term=evidence+of+evolution+station+activity+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413719/normal_602d2be3081bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383561/normal_60257204d9d44.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/646f0188-1cad-42f6-ae10-c9465e3e1b0c/27101942815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd39870-b32d-4d63-af3a-96dc0158d5e5/workkeys_scores_gold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b47d7c6d-4a4f-4d48-ac5c-82bf4a8e4e9b/17070033571.pdfIn PDF document text
    • http://jumogitakos.pbworks.com/f/kerido.pdfIn PDF document text
    • http://jedilukiwo.pbworks.com/f/pefulofo.pdfIn PDF document text
    • http://tulusozofel.pbworks.com/w/file/fetch/145219878/nitro_64_bit_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f575abc-91b2-4825-80b7-3afd926cd1d7/vuzelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9a838e7-524b-49c6-8bca-5180b46e8371/what_is_teaching_philosophy_of_education.pdfIn PDF document text
    • http://zeranagaro.pbworks.com/w/file/fetch/144711951/nexobagorilajosagef.pdfIn PDF document text
    • http://buvavipoluvu.pbworks.com/w/file/fetch/144645690/west_africa_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5409d4f5-79ce-4e3c-a216-100fb0b44b99/moores_essential_clinical_anatomy_6th_edition_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f62e34d4-5377-464a-aad3-202046dd61e9/22997074823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28b5efe-56b6-475d-a7b9-bc36284c1552/7385889155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eae6c95-70d0-4175-b488-4b39355d06d9/samsung_laser_printer_not_printing_clearly.pdfIn PDF document text
    • http://bowawesup.pbworks.com/w/file/fetch/145082931/indefinite_possessive_pronouns.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7044d92c-9387-467c-b37b-4513a66a60e7/calories_in_a_sausage_breakfast_toaster_from_sonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/667a0a50-a273-4b10-862a-d3982b196723/14261503273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5813997d-afeb-4112-a9a5-6b37387e0770/66891496774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540bfbd0-eb4e-43f2-ad79-d5494fe28d15/plato_symposium.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/145034934/2437459324.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B7 5108 bytes
SHA-256: 11bded78f2efdc57795d90a14760aa28ab7a8da7b2fb113c730305bff83d8053
font_01_sfnt_off0000e937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 10300 bytes
SHA-256: 4cb4ce8c1cfe21dfd08509470d65814a4025e75a1186425b97d1e899b09ad033
font_02_sfnt_off00010c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C93 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_03_sfnt_off000121c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C2 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

Open this report in the interactive analyzer, or submit your own file for analysis.