Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f2a0c96395bf0b…

MALICIOUS

PDF

76.2 KB Created: 2021-09-20 03:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2169bdc79c63fb0e9bc3b34bf986b02c SHA-1: 0301668f565fd4d91372b8f0d663dab1f733085f SHA-256: 74f2a0c96395bf0be5ceb73e7ad3ce282ee8f3c8d8e103aae876f5ed38bf0182
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic of using password-protected archives to bypass gateway scanning, further supporting a malicious payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=parabola+turning+point+formula PDF link annotation
    • http://jamalcar.com/userfiles/file/13560269153.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/12759479980.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/69838082628.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/42360716032.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/25157500024.pdfIn PDF document text
    • https://kohphanganhotelandtour.com/userfiles/file/20571668870.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/bizawekoxepoberasesegoxid.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/55221850163.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/uvbl52mj6nji4htr317etvjae3/54297750081.pdfIn PDF document text
    • http://autoscuolapezzano.it/userfiles/files/84264369262.pdfIn PDF document text
    • http://namthangbasaltstone.com/uploads/image/files/togederugivekogilidolaze.pdfIn PDF document text
    • http://palletgoanloi.com/img-dn/files/pamutotuzat.pdfIn PDF document text
    • http://uhy-th.com/image/upload/files/72712492042.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/64859773830.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/koxenuzuju.pdfIn PDF document text
    • https://theipbuzz.com/images/file/24035442231.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/91392761388.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca94bae3f7---loxuvavofulebavolami.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1631020335.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/gimawegokevibukoj.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94695107026.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D7 10644 bytes
SHA-256: 972d07477467f6a3b921b89e776a2d2fa68532f5781015b6619ccab6a9453f22
font_01_sfnt_off0000daf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF302 18492 bytes
SHA-256: 66633ab6ec7dbb631fe9610bde798554f37d215f119d265a88d46f4b3fabae16