Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f91e0207e7f1d5…

MALICIOUS

PDF

68.2 KB Created: 2021-03-18 16:54:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3bff766de2cbba44b132767417a3b27b SHA-1: b275829f887fadc8dd9579f6f4c7ffd2a726e523 SHA-256: 44f91e0207e7f1d5dd26ddbd0d52d1a437f382f0b47fdcbe55fdd1c5b9fde3bb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a lure referencing a movie title, likely to entice users to click on the malicious links. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=hamlet+mel+gibson+full+movie+online+free PDF link annotation
    • http://tibagisuminove.sportsontheweb.net/books_of_orhan_pamuk.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/hjfu7ii/kawarakutuvojalogek.pdfIn PDF document text
    • http://volalagokiva.sportsontheweb.net/kulekazizogobadilevi.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/72853876898.pdfIn PDF document text
    • http://kifisafobubupo.mygamesonline.org/canterbury_tales_prologue_middle_english.pdfIn PDF document text
    • http://takipibimaxubov.sportsontheweb.net/widedileru.pdfIn PDF document text
    • http://rasidafepu.mypressonline.com/lenewefositizamok.pdfIn PDF document text
    • http://tigutiput.iblogger.org/list_of_us_state_capitals.pdfIn PDF document text
    • https://cdn.sqhk.co/febenanedibu/gcgikjb/5406502943.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/74178cd1-d81f-493f-8a35-8fb251767dec/memento_mori_jewelry_skull.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/41202050091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f798d68a-d112-424a-951b-e4fe86f68261/vujotisawazelag.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/audacity_free_for_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554ff70b-82ff-4aca-b13e-224f3bc7b28f/what_are_the_subjects_in_ethical_hacking.pdfIn PDF document text
    • http://zukisofom.epizy.com/certificate_of_employment_with_salary_format.pdfIn PDF document text
    • http://lugorigarotari.epizy.com/keto_diet_what_not_to_eat.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/skip_survey_file.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eeab4ef-dfdf-48b9-9707-11f16d997fd9/sidutikuvamipeg.pdfIn PDF document text
    • http://wokarodefi.onlinewebshop.net/qatar_airways_cabin_crew_interview_questions_and_answers.pdfIn PDF document text
    • http://pexefenebize.epizy.com/materialismo_historico_ensayo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62be7f32-16f7-4f3f-93e6-96a19713ca46/jumifime.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_off0000cbd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD7 5248 bytes
SHA-256: cf0822e19dd76211d1ff57f4607dc1054b60deecf1dfa8400c4fa43b3dd7257e
font_01_sfnt_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 11084 bytes
SHA-256: 6af393121f8681b68e1928317100e3a8d3f433107fa0c4169f458588fd9723d4

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