Malicious PDF — malware analysis report

Static analysis result for SHA-256 2086c52f0af96d89…

MALICIOUS

PDF

77.8 KB Created: 2021-02-20 07:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6de91fcc9dbf982d451fb9ed22bb4519 SHA-1: 4098e685cd7b14eb2cfa46c0b44079a2463d5f3a SHA-256: 2086c52f0af96d89419fd68a81eaf8fb6363efa6bd094845145f5908a0a2fdf5
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, suggests a lure related to a book title, which is a common tactic for phishing or malware delivery.

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://baarspo.ru/strik?utm_term=dan+brown+book+origin PDF link annotation
    • https://damitonamusu.weebly.com/uploads/1/3/4/3/134306925/zopadunurevifaruvir.pdfIn PDF document text
    • https://cdn.sqhk.co/mejiwimuza/jeiipia/31172636012.pdfIn PDF document text
    • http://jajeredax.22web.org/5068090686.pdfIn PDF document text
    • http://wegansit.space/revue_technique_berlingok0bvs.pdfIn PDF document text
    • http://zumepelilebatu.22web.org/85006807314.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/hajcGhi/disul.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/kowebenu-gujid-kerobelus.pdfIn PDF document text
    • https://jibajupo.weebly.com/uploads/1/3/1/6/131636806/pubozifojoget.pdfIn PDF document text
    • https://lidixegivutowo.weebly.com/uploads/1/3/1/4/131453330/6237622.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/iiicje6/run_rabbit_run_song_in_horror_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/ijjfhgG/badland_winch_review_9000.pdfIn PDF document text
    • http://creamwalls.space/mapamundi_para_colorearwhmjn.pdfIn PDF document text
    • http://all-gopro.com/big_note_piano_sheet_music_free74zvx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonanelokuweje.rf.gd/free_halloween_wallpaper_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/catalina_mac_os_dmg.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/norodumatemigufe.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/introduction_centrifugation.pdfIn PDF document text
    • http://fudewalazakukug.epizy.com/vopujatili.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/guided_meditation_for_stress_jason_stephenson.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/avast_pro_antivirus_free_offline_installer.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_off0000f338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF338 4940 bytes
SHA-256: 3f704a24c43defa9927ea498b0c4a0d6b1a25700bbba030772122f5957c5df08
font_01_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 11528 bytes
SHA-256: 0b7bd10f10c2523646c54afef8ec728315ee8f710d9fe9c36e947be2c663ce50

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