Malicious PDF — malware analysis report

Static analysis result for SHA-256 671bc544bbb85fef…

MALICIOUS

PDF

85.3 KB Created: 2021-04-08 05:02:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c94a8fbdd9d49b5b06fa8d51a35ec7d SHA-1: 7ba229b88cf4fd011243eebbf60385fe3a7fbf9d SHA-256: 671bc544bbb85fef5a195d09d54bd00201fd87864ed026565f0175a3e1ca11be
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious URL. The document body, though heavily obfuscated, contains text related to the URL's keyword, suggesting a phishing or malicious content lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=anxious+for+nothing+lucado+pdf
    • https://cdn.sqhk.co/lexikegije/jK0higd/defender_90_td5_review.pdf
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/tefupevirovokis_xiviwaxusu_gekojuni.pdf
    • https://cdn.sqhk.co/ruwonumatag/fghcjht/cnc_machinist_jobs_in_odessa_tx.pdf
    • https://cdn.sqhk.co/vegedusovo/dheHjbS/piano_2019_apk_download.pdf
    • https://cdn.sqhk.co/gixegusu/HTYgeqn/fefit.pdf
    • http://fanuvazav.scienceontheweb.net/82913011540.pdf
    • http://lazujifoxupa.getenjoyment.net/the_lady_with_the_pet_dog_anton_chekhov.pdf
    • http://forexgeeks.net/megafasizarivebiza3hdyn.pdf
    • http://creditinquiry.info/jisejetatavutitulexetox975wl.pdf
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/gejebikidalo_makuwirijono.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://fbaba6ab-37cf-477f-82bd-e10a416eccda.filesusr.com/ugd/3c8574_1d505713a71744a1bd6b48d7b3fa541a.pdf?index=true
    • https://a3c35cc3-4a3f-4d41-ab51-8b3e4b114d30.filesusr.com/ugd/2b25b5_1cee00ff3ca14cbf9d31300dc250e953.pdf?index=true
    • https://s3.amazonaws.com/metakibeme/aluminium_potassium_sulphate_msds.pdf
    • https://s3.amazonaws.com/lizuseguwix/98303128234.pdf
    • http://bilisedutave.myartsonline.com/11646233265.pdf
    • http://bugenerefajujus.atwebpages.com/53688799020.pdf
    • https://s3.amazonaws.com/jixeremipet/25383936697.pdf
    • https://s3.amazonaws.com/neporezofov/victoria_s_secret_angel_card_information.pdf
    • https://s3.amazonaws.com/piwanisaj/time_to_file_answer_after_demurrer_california.pdf
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_dd193f8fba7044eda728efece811e57e.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010df7.bin
2ec7fa1ac232b546fa8c47e6ca7334a567870a3dd6ed826bdc1cded2b79c915e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DF7 5472 bytes
font_01_sfnt_off0001209c.bin
837ed7e844502adb1f76b3072fb63b1d9af4c0e8d491bae2af1ae1d2c157fb55
pdf-font-stream PDF embedded font (sfnt) at offset 0x1209C 11504 bytes