Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa6a0348abec860f…

MALICIOUS

PDF

79.0 KB Created: 2021-09-23 22:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bb49392d62fb34e5476c890a71fc05eb SHA-1: 46aeb63f8c24a52885d61e92a44ba9512cf38fe4 SHA-256: fa6a0348abec860f3202eb711a13bef244ef053fce91fcece1d85aa50281f71d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that form a link farm, directing users to various domains. The heuristic 'SE_QR_LURE' suggests the document may instruct users to scan a QR code, a common tactic in phishing campaigns to redirect to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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
  • 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://huntic.ru/uplcv?utm_term=qr+code+scanner+on+android PDF link annotation
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/vojozurakodero.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/tuzep.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/xaleforeti.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/55622513565.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/wumekuwowupepovisakometo.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/1166412196.pdfIn PDF document text
    • http://lecostationery.com/files/file/vudefekewepemi.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210905084245.pdfIn PDF document text
    • http://yuqiaohome.com/uploads/files/202109130254086810.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///37470166619.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/26354231386.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/nidijofarepetadugix.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/nidafaxaxewin.pdfIn PDF document text
    • https://topclassgardening.nl/images/file/savilizanove.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/tamamurutoxosowileketofo.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/12999927336.pdfIn PDF document text
    • http://magdrywall.com/project-new/christianbook/upload_images/file/63358937593.pdfIn PDF document text
    • http://phonphangschool.com/upload/files/zopogotulupazabogod.pdfIn PDF document text
    • http://btfa.tw/upload/files/48313690669.pdfIn PDF document text
    • http://ciskmv.com/css/file/lobevewukalugun.pdfIn PDF document text
    • https://advantage.ee/media/contents/file/53260352740.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/22140142831.pdfIn PDF document text
    • https://eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/bimabefetozazoba.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_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 17724 bytes
SHA-256: c5dabca0fa2e877f5582ac7509262b83fcda1fa4b0c3902a6504358fd81d1108
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 10280 bytes
SHA-256: ebf6b63ed98a4556bf81b1002c82f1bfd7745d1655e0562c2ea02a8bf7435695
font_02_sfnt_off00011682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11682 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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