Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f8db2cc5d89cd99…

MALICIOUS

PDF

85.6 KB Created: 2021-05-18 01:23:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4a708c935db39b8251b40f65744c6634 SHA-1: c4ab59ecd9f9ddbc3035f6b198eb76eccb059a5a SHA-256: 3f8db2cc5d89cd997c184c2d41508a1969880569d8fcc14fbaf451050f02edac
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL that redirects to 'https://soxebez.ru/strik?utm_term=resumen+del+libro+del+mundo+de+sofia+por+capitulos', which is flagged as a potential phishing or malware distribution site. The document body, though partially corrupted, suggests a lure related to a book summary, likely to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://soxebez.ru/strik?utm_term=resumen+del+libro+del+mundo+de+sofia+por+capitulos PDF link annotation
    • https://raxopukefafifi.weebly.com/uploads/1/3/2/6/132695755/vezovilivu.pdfIn PDF document text
    • https://mefewenitili.weebly.com/uploads/1/3/1/3/131379946/3776068.pdfIn PDF document text
    • http://navewezaninub.iblogger.org/lagagufuwix.pdfIn PDF document text
    • http://notojubemeduxan.iblogger.org/tumulokanigodod.pdfIn PDF document text
    • https://kebafilononuxo.weebly.com/uploads/1/3/1/3/131378837/125836.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/dictionary_use_practice_worksheets.pdfIn PDF document text
    • http://mosivenatekes.22web.org/jewufutona.pdfIn PDF document text
    • https://vuterezupip.weebly.com/uploads/1/3/1/3/131380942/8137764.pdfIn PDF document text
    • https://badetujunomut.weebly.com/uploads/1/3/1/8/131857650/1185177.pdfIn PDF document text
    • https://woviximanikiz.weebly.com/uploads/1/3/4/6/134693880/wuxirimige.pdfIn PDF document text
    • https://nunezexivu.weebly.com/uploads/1/3/4/4/134440215/gupiz.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://s3.amazonaws.com/xefejevife/the_backyard_homestead.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/personal_goal_development_worksheet_example_brainly.pdfIn PDF document text
    • http://wevosana.rf.gd/overtime_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7de23ca-aa5a-40b6-9ea9-c8d3924d999c/11454694564.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbd4752-69a0-487e-a3f5-6f770f98c7d9/canon_mp250_driver_for_chromebook.pdfIn PDF document text
    • http://kalotiwinilobiw.epizy.com/murovasigipajadopexo.pdfIn PDF document text
    • http://fajigusis.epizy.com/how_to_program_a_radio_shack_triple_trunking_scanner.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/2014_chevy_impala_limited_manual.pdfIn PDF document text
    • http://pekaporev.epizy.com/advance_payment_request_letter.pdfIn PDF document text
    • http://rixoxogan.rf.gd/bayesian_statistics_and_marketing_rossi.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/68556221886.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/68204622601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fccf0125-1b6b-4d6c-823d-74c487abd34d/goganaliwagazizusonex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/540230cb-9588-418d-8bbf-c65b405c34f5/health_psychology_biopsychosocial_interactions_9th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0cb8bc7-a8e3-46d7-a451-3fe5719cd948/64827400558.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_off00010096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10096 5328 bytes
SHA-256: 249f97c40358a0c33f196d23b8949317092cb8ae9606a4e8e0063a11b5ee49c5
font_01_sfnt_off0001128f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1128F 11564 bytes
SHA-256: 1d8291d5f93ba65d639c46166f0bce8dec8f86a09c9f2b93f50553ffe137d7b7
font_02_sfnt_off00013843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13843 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e