Malicious PDF — malware analysis report

Static analysis result for SHA-256 035123231cd9f9e2…

MALICIOUS

PDF

70.1 KB Created: 2021-10-02 13:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0157396d61731a74a7a225ec377c05fd SHA-1: 0231e699b255ff8fa2a461f3b09a3c80be658026 SHA-256: 035123231cd9f9e2ab776e450b99b41292efab9834047e5bfd31508588a377a7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the idea that the document is part of a link farm, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://pixomot.ru/uplcv?utm_term=the+parachute+and+its+pilot+pdf PDF link annotation
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614231e9733dc---11087061893.pdfIn PDF document text
    • http://starfishdowney.com/uploads/files/puzugebovijotivamadafexi.pdfIn PDF document text
    • http://stylekd.ru/files/2600328274.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/60655694909.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/58729261715.pdfIn PDF document text
    • http://neogmbh.de/www/sites/default/files/userfiles/file/39245369425.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/10-01-17-33-48-62.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/dijad.pdfIn PDF document text
    • https://braus.uz/images/shared/file/lukifadoripanitipi.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/xosutisebofawuvupuwepifi.pdfIn PDF document text
    • http://s13cf5ef.alojamientovirtual.com/ropadefutbolbarata/userfiles/file/xibaxexavososuzujekune.pdfIn PDF document text
    • http://mannaz.pl/userfiles1/file/wumapekevizezuminopi.pdfIn PDF document text
    • http://myphammonly.com/luutru/files/19369436654.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/latunisowokewubed.pdfIn PDF document text
    • http://kant21.com/userData/board/file/63220955760.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/10435010343.pdfIn PDF document text
    • http://shangrilatheshow.com/ckfinder/userfiles/files/pojejovinanijedoxiz.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/82739169326.pdfIn PDF document text
    • https://kompaspt1.com/contents/files/binikavidajoxipefusiluj.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/lukodixitamomixezetapifa.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/72273347276.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/93757606309.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/wasibiroxadip.pdfIn PDF document text
    • https://chanty.dacola.com/upload/files/lawoxuna.pdfIn PDF document text
    • http://tiquital.com/documentos/file/72419201912.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/57038930835.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_off0000b4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB9 14868 bytes
SHA-256: 5e9da1b80ce13b94c0354f907b58559e2818131d041f0bb3c83954703fe92655
font_02_sfnt_off0000f1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CA 10780 bytes
SHA-256: b940a0943bfec2c01798d0b31dde1371b29b8b2cbe7ecf1c800231a8fa50c30d