Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1994ebc0d7ee93c…

MALICIOUS

PDF

70.8 KB Created: 2021-09-24 21:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d9cfa2192123b7a6b8c943dc0fef5101 SHA-1: 4e00ebd2f1c93e9354d74c00ec3152aeb89951b4 SHA-256: e1994ebc0d7ee93c6d03c17515c573bfb992109a705048c8838e66d68cc0801d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics indicate the PDF acts as a link farm, directing users to numerous external websites, with one notable example being http://lokalsport.no/userfiles/file/pexaxijipelatinesokinugil.pdf. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs suggest it is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://lokalsport.no/userfiles/file/pexaxijipelatinesokinugil.pdf In PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16144a1f4aba43---widebududojotam.pdfIn PDF document text
    • http://24cvety.ru/upload/files/7061489785.pdfIn PDF document text
    • http://handgun.ee/media/file/didonolofezugopisugoji.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/74336155870.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/mivebomolibojojemanowisa.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/soxuzununasenifed.pdfIn PDF document text
    • http://chikatere.com/Upload/files/maruligul.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/tokenogatapikejazines.pdfIn PDF document text
    • http://azs-szermierka.pl/zdjecia/fck/file/defilawuvafamuzewutoji.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/62327613731.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/14285293808.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/pelabajonezexuwejutuzu.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/salev.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/wuzunafawurewate.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/50657850629.pdfIn PDF document text
    • http://telesson.net/_UploadFile/Images/file/kamizekivokitidixala.pdfIn PDF document text
    • https://tyeetomsfishing.com/userfiles/file/4593203299.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/57117717471.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/ecd750f86ecd0d6277f2c77949f08aa5/13789050032.pdfIn PDF document text
    • http://konyanincigkoftecisi.com/userfiles/file/gewozulomiwodukafo.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b76d3eb80a---49679333035.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/gobawuxarenemusakalexe.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/98323128506.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/pifubesuzupe.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/gajaxidudepalage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=corporate+finance+stephen+ross+pdfPDF 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_off0000b444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB444 16348 bytes
SHA-256: eda3fa0da7beacc9227e600438d027ef5e8cf55751f6fcac7c0ec263f846ba07
font_01_sfnt_off0000dd22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD22 10704 bytes
SHA-256: 788e45ca3d51126855faa9a8ce884f124f42448119be30377a50e5dcbe71e8ab
font_02_sfnt_off0000f5a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1