Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd569882167fa60…

MALICIOUS

PDF

86.1 KB Created: 2021-09-20 04:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: aaed479479b051ff49e397485891b917 SHA-1: 2239a6f4cc11bbe81d08eef68639bec61fc22df4 SHA-256: ffd569882167fa60fca5fe2e45119fe3a78e63599328f8d385dbe599cee1957e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=jcheater+san+andreas+edition+aptoide PDF link annotation
    • https://pasarangroup1.com/contents/files/73647642943.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/futejumefiwujuv.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/87591682306.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/xexipibo.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/51402682688.pdfIn PDF document text
    • https://kawanmto.com/contents/files/jibelenijudovupona.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/siwimovixipaxofaze.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/bufajazu.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/79168239278.pdfIn PDF document text
    • http://johnmarzillier.com/ckfinder/userfiles/files/dafibobasofejuvo.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/xerolagerebapojebal.pdfIn PDF document text
    • https://bywuf.org/upload/editor/files/74609389292.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/161474e867da0c---sudojopaxeguk.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/bonibagekojotubaseluwoned.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/15387963896.pdfIn PDF document text
    • https://netpage.info/userfiles/file/91459443900.pdfIn PDF document text
    • https://kalendarz.probik.pl/fckeditor/userfiles/file/78188180579.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/1813267530.pdfIn PDF document text
    • http://vekosgroup.ru/userfiles/file/kowuriba.pdfIn PDF document text
    • http://studiotecnicodama.it/userfiles/files/48948064010.pdfIn PDF document text
    • https://free-spirit-city.eu/uploads/wysiwyg/files/rerepofuxapufi.pdfIn PDF document text
    • http://rem-proekt.com/f/file/79105390627.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_off0000df84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF84 10556 bytes
SHA-256: d0b21f4681f46f4e86a15b099d9d95d5e3b88ed97cd776e93ea45ecfea925eee
font_01_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9F 23312 bytes
SHA-256: 2cb420898704d905110b6937d28e75c294d5f78b2ffb07cde0bc31acc3fa3bdc

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