Malicious PDF — malware analysis report

Static analysis result for SHA-256 e675c2ba0086f5f1…

MALICIOUS

PDF

76.5 KB Created: 2021-10-10 02:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 35a349ac52f3c06c957f221fac1ada37 SHA-1: 56cf3c84f10335799479437286d233530edd1963 SHA-256: e675c2ba0086f5f18f218fe4704b7c1470f12d5dad6a9f60dd7a1836217c516c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm designed to redirect users to malicious content, specifically a cracked software download. The presence of numerous external URIs and a high ML classifier score strongly suggest malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this, indicating the PDF itself is part of a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://medvor.ru/uplcv?utm_term=download+miracle+box+2.82+crack PDF link annotation
    • http://llux.vn/uploads/files/zezisesafipekinodigugagis.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/84054308604.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/fowogoluranowuxanu.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/2656589694.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/24002373813.pdfIn PDF document text
    • http://my-glc.com/uploads/file/sonadiranopixepizir.pdfIn PDF document text
    • http://2446665a.ru/ckfinder/userfiles/files/18744918654.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/sadawes.pdfIn PDF document text
    • http://csc0851.com/userfiles/file/20210906022242_d8glgu.pdfIn PDF document text
    • http://sp2wronki.pl/fotki/fotki/file/48703892658.pdfIn PDF document text
    • https://horkolas-gatlas.hu/ufiles/file/getutadefefodaneneb.pdfIn PDF document text
    • https://baglab.pl/galeria/file/84673777630.pdfIn PDF document text
    • https://glozor.com/userfiles/file/62422701104.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/45121618919.pdfIn PDF document text
    • https://cargoservice.pl/cargoservice/userfiles/file/foporun.pdfIn PDF document text
    • http://josephfellerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/33740583060.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/tinerapijotegez.pdfIn PDF document text
    • http://sake2metustin.com/uploads/files/89268084214.pdfIn PDF document text
    • https://ipekyolumedya.com/resim_galeri/file/lelisawerotebavujidowuvi.pdfIn PDF document text
    • http://honda-vo.com/upload/file/8114521623.pdfIn PDF document text
    • http://worldwidestationeryholdings.com/files/file/dizifezuke.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/59072186343.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/5588390401.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1614b184d0ba8d---puzinejumelaru.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f061ddedd0---8060824209.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_off0000c43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43C 17892 bytes
SHA-256: e842665ff9ad5f7e21bef272bc0621e59dc689b5c264b9e2d328e957f7e7abbd
font_01_sfnt_off0000f299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF299 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB0 11080 bytes
SHA-256: e518448731a47183b426cb7767b0c5dcf1fed9ab2795d84694b1b817b1426fef