Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3181ab8a32e5d38…

MALICIOUS

PDF

84.8 KB Created: 2021-04-28 10:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5d527b66b2e0f6ae48446bafca336c2 SHA-1: 6011fac6cfcf324cbc373208bd4e2fbb20966c03 SHA-256: e3181ab8a32e5d382ed8c9e1fbc43112714f3383635048fccb52d4c89112d41a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site, disguised as a genetics worksheet. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs and the document's deceptive content point to a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=genetics+pedigree+worksheet+answers+pdf
    • https://static.s123-cdn-static.com/uploads/4413969/normal_5ff610b2e7b45.pdf
    • https://cdn-cms.f-static.net/uploads/4475738/normal_60546867824ee.pdf
    • http://justiciaforjustice.com/can_you_get_unemployment_if_you_get_fired_within_90_days_in_texasrmxdz.pdf
    • https://cdn-cms.f-static.net/uploads/4466175/normal_604129c030093.pdf
    • https://static.s123-cdn-static.com/uploads/4415300/normal_5fed9fcb05300.pdf
    • https://leliwigozamik.weebly.com/uploads/1/3/0/7/130738568/3e12aa67ca27cea.pdf
    • https://namoturobiro.weebly.com/uploads/1/3/0/7/130739164/fuxuriw-katupagerepozil.pdf
    • https://cdn-cms.f-static.net/uploads/4505839/normal_602479687534b.pdf
    • http://bahis-sikayet.com/brother_mfc-j835dw_wireless_setupaw4cz.pdf
    • https://static.s123-cdn-static.com/uploads/4388407/normal_5ffaa2bf7e0ed.pdf
    • http://zakosemej.mypressonline.com/3331865006.pdf
    • http://halfraire.xyz/99105556242gkf5r.pdf
    • http://dotenipago.medianewsonline.com/40886532671.pdf
    • https://sidujojuwizubal.weebly.com/uploads/1/3/4/5/134587716/61d79924b.pdf
    • http://gidpopiteru.com/adblock_web_browser_apk0ene3.pdf
    • http://lapivakop.getenjoyment.net/42963742666.pdf
    • https://cdn-cms.f-static.net/uploads/4464869/normal_6009d9658a111.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dekifovep.epizy.com/aadat_hai_song_mr_jatt.pdf
    • http://gexegubiduw.atwebpages.com/empty_bingo_sheet.pdf
    • http://zufonokimilije.epizy.com/18438760426.pdf
    • http://parekiwebepis.epizy.com/49886963274.pdf
    • 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_off00010cd2.bin
403376a6dd7806b68da876cbf77c710951b53c7b7044a140aca404319d40d714
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD2 5572 bytes
font_01_sfnt_off00011fdd.bin
6bcc3ff89018466416a52963bc90fbdf5a47703bfa29dc4198fcb8d7d912f84f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDD 11136 bytes