Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ca2a7bc9e93d4f…

MALICIOUS

PDF

68.0 KB Created: 2021-09-30 16:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4f549eb47427b559bb19831c8ef08df2 SHA-1: a1abaf59c839a791b9559f900120b136559dfa6f SHA-256: c6ca2a7bc9e93d4f8fc509ba9a697dfd28523ded828ba9241fdc4bcc9a943503
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a phishing lure, including an image-only appearance and embedded clickable URIs designed to redirect users to malicious sites. The presence of embedded JavaScript, coupled with the ML classifier and ClamAV detection, strongly suggests malicious intent. The document likely aims to trick users into clicking a link that leads to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://happycolaborativo.com/uploads/files/wupuzekagexuwatim.pdf In PDF document text
    • http://beiwendq.com/data/attachment/file/45922211653.pdfIn PDF document text
    • http://starroadchina.com/userfiles/file/52354722450.pdfIn PDF document text
    • http://lovesenergy.nl/file/6658720676.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/zegojibokava.pdfIn PDF document text
    • http://piazzademarini3ge.com/userfiles/files/fobife.pdfIn PDF document text
    • http://rapet.hu/files/ridasolofif.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8ea7f5a5391d8fce78818e437e46274d/bososodojefifo.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/vijuzexebadekogeti.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/popoxedezoxatit.pdfIn PDF document text
    • https://halkapsikoloji.net/userfiles/file/rapitekuvolo.pdfIn PDF document text
    • http://balone.net/_upload/file///13548324012.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/72514460752.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/tuwibevozuwijoxilofi.pdfIn PDF document text
    • http://scuderia512.com/js/upload/files/96745508099.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/14936502877.pdfIn PDF document text
    • https://topupdana.com/contents/files/62479846829.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/gijowikezuwomoleginuru.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/18232386039.pdfIn PDF document text
    • https://theshamrockpublecco.it/file/20126797236.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/89870901338.pdfIn PDF document text
    • https://reha.bg/content/upload/file/vufos.pdfIn PDF document text
    • http://merwepizza.com/upload/file/30366618210.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+make+live+lock+screen+wallpaperPDF link annotation
    • 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_off0000ad92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD92 10772 bytes
SHA-256: 692022e4b4c1a5cc8f1f32b744857cc2180544ac2d54ac538e28bc2fcd6503b3
font_01_sfnt_off0000c659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC659 14516 bytes
SHA-256: 3e6caed2e5ae05c1466db9babe9cc3c4e2d6224d8a108b3daed394b15506af69
font_02_sfnt_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1