Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec76ee8ccf5ba0b2…

MALICIOUS

PDF

67.4 KB Created: 2021-10-04 01:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1ea4e577a2028eb739925b408b221ee SHA-1: faf2cb8fe3277363021f413d870bb2549f1f8aff SHA-256: ec76ee8ccf5ba0b249c89eb978236197c98c01221c5522742e3d21e037888e7d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL and is flagged as a phishing lure by multiple heuristics, including its small size and image-heavy content. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests the document is intended to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 67 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.
  • 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://irlanc.ru/uplcv?utm_term=independence+greetings+images PDF link annotation
    • http://jrmhandling.nl/upload/file/64418704309.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021092218520710.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161540634e1538---28309387656.pdfIn PDF document text
    • http://toyotarent.tw/FileData/ckfinder/files/20210907_2A61B1E50FE38929.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/43849791297.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/betedodapiliwujopa.pdfIn PDF document text
    • http://195exim.com/datas/files/27448213624.pdfIn PDF document text
    • http://sten.kr/club/data/userfiles/file/20210911144920.pdfIn PDF document text
    • http://bwemfjhjk.friend-match.com/upload/files/wogimilapetovoripi.pdfIn PDF document text
    • https://mintowncoffee.net/uploads/images/files/71257212816.pdfIn PDF document text
    • http://huiking.cn/uploads/file/032226301258.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/91290120050.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210905183155.pdfIn PDF document text
    • http://halmar.info/userfiles/file/21846302191.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/pobunewujenogag.pdfIn PDF document text
    • http://uniroll.pl/user_images/file/17908934197.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/21962115730.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/9260534613.pdfIn PDF document text
    • https://sjaindonesia.com/sitefiles/file/45378659201.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/kaapsqu8uqm6e322pl6lk01pi5/pemokopisarapenotukudu.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/jasowufikubivezaduv.pdfIn PDF document text
    • http://gibisch.info/files/files/61524498283.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_off0000aba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA3 10640 bytes
SHA-256: a0eb045e818eabe9724349d49b40f9d4e5e9d90b430150dd8c8d0369aa23305d
font_01_sfnt_off0000c3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B9 14496 bytes
SHA-256: 8316ef929bb200bf09717f3c3065f2681ad50859396aa43e556b5e675e00c46d
font_02_sfnt_off0000e824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE824 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.