Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae0103a464548d30…

MALICIOUS

PDF

70.1 KB Created: 2021-10-02 22:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8eb333db8192ac04e2da7b463969bf18 SHA-1: 1d1d94bea633bb9385e528f1bc987ec46f9bba8d SHA-256: ae0103a464548d3083bb0dd73ddbe316ac96719408351943b8b709fab0049995
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious or deceptive content, possibly as part of a phishing or SEO poisoning campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://wronba.com/uploads/wysiwyg/file/47901841507.pdf In PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/83072528066.pdfIn PDF document text
    • https://nyig.com/files/file/25135481049.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/lawilederuvepeber.pdfIn PDF document text
    • http://mos-craciun-inchiriere.ro/fckfiles/file/75302234096.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/43141430396.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/95654403144.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210930222841_393851961.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/woguzo.pdfIn PDF document text
    • http://wine-paraphernalia.com/files/winep/_repo/file/48324897263.pdfIn PDF document text
    • http://golfproradost.cz/webpagebuilder/ckfinder/userfiles/files/dezavimedewu.pdfIn PDF document text
    • https://bauarch.bg/files/fadukufipaj.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/66611844533.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/bujukufilimozemu.pdfIn PDF document text
    • http://ranch.pl/files/file/55407300710.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/20219279601476.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/namovomoditego.pdfIn PDF document text
    • http://www.atsamuihaus.com/image/upload/File/gemizuf.pdfIn PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/6152306995.pdfIn PDF document text
    • https://beldapin.com/calisma2/files/uploads/91748276281.pdfIn PDF document text
    • http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/69730968967.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/dipiravoluj.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/kebuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=function+of+ace2+receptorPDF 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_off0000b16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB16C 15984 bytes
SHA-256: 3a5976bd511c802910fefd76b8fdfcbde5b294482787c7949ff4156b74c16a73
font_01_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 10456 bytes
SHA-256: 72e1e574953d26c3abdf3defa86ef54f4de36cd690adcdd1faa429120d2138a0
font_02_sfnt_off0000f26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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