Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa549f936e05ed60…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 14:30:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 02d35953d9b9de8c28e44dac1d5890a0 SHA-1: 8d8e961f20a63adfb44db5fa48b099745116508f SHA-256: fa549f936e05ed60d68dbc9210ce8fc5bb91f1b86220c395155684be7b5f238a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous embedded URLs pointing to various domains, many of which are structured to appear as file downloads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a large number of links on disposable hosting, a common tactic for phishing or distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=hbo+max+apk+file PDF link annotation
    • https://haisanquangninh.org/data/dulieu/files/diraxureba.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/65328317437.pdfIn PDF document text
    • http://mywymc.com/userfiles/file/74800835638.pdfIn PDF document text
    • http://kite-surf.sk/files/91348629400.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/98822455272.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/32337422280.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/85083961938.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/48403940316.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/71822640483.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/wagubinuzowidagem.pdfIn PDF document text
    • https://bak.vn/upload/files/rotumosejololuladafaw.pdfIn PDF document text
    • https://ccs-corporation.com/ckfinder/userfiles/files/texudigeledinegonagarokij.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/rakegux.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/ddc41bca7e7de1ee2b51fff5d15812a2/4475729501.pdfIn PDF document text
    • https://gruppopolidori.com/upload/image/file/87117611061.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/80351601441.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/fewak.pdfIn PDF document text
    • https://lose-weight.tw/upload/files/pixusamu.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/89252899530.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210917_062638.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/wanuze.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161355f415c307---78249916575.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/8942524334.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/sikezerigakivo.pdfIn PDF document text
    • http://de-ko-gmbh.com/ckfinder/userfiles/files/vedunabelogi.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_off0000d24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD24E 23400 bytes
SHA-256: 1f9d48e64e460ff6e511d87654643e0df79934e72794c22657d3c3f873d5a581
font_01_sfnt_off00010e89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E89 10376 bytes
SHA-256: 8f7d9bc4f85b46c09e53a5e37206dec4c1301b8f8cc22f1e2671428d052ea33d
font_02_sfnt_off000125bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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