Malicious PDF — malware analysis report

Static analysis result for SHA-256 d09d7bd250e3a338…

MALICIOUS

PDF

68.4 KB Created: 2021-10-01 09:56:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9de1ca44b13420bcd8c97a34b1210ebf SHA-1: ef4913c50ec902fe4b6926d78cb64f0d4d8d8d04 SHA-256: d09d7bd250e3a338275ee7f561a66e3f18eb6467ad48de96d2d220dde504a14f
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was identified as malicious by a ML classifier and ClamAV, exhibiting characteristics of a phishing lure. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-only document with a clickable action, designed to trick users. Multiple unknown URLs were extracted, suggesting a potential distribution or redirection mechanism.

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://accounting789.com/ThImg/file/82472010744.pdf In PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/fapizikinubatopur.pdfIn PDF document text
    • http://25630638.kad.tw/kads/ckfinder/userfiles/files/vulanakik.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/ribeteboxasi.pdfIn PDF document text
    • https://araprinter.com/ckfinder/userfiles/files/filifibuxulusow.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/bosodufizejex.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/norewigudi.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/jifujek.pdfIn PDF document text
    • https://pre-www.bridge-college.com/uploaded/ckeditor/files/22056633056.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/nufasipitasazetiz.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/lazomugelej.pdfIn PDF document text
    • http://dmhu.eu/uploads/uplib/file/14636517121.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/xuvuvezudoti.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/67546728939.pdfIn PDF document text
    • http://www.rajpuc.pl/pics/file/66261755604.pdfIn PDF document text
    • https://kristaldicarlo.com/userfiles/file/revok.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/limarananexifulepires.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/11996297893.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/23356939078.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/32178477566.pdfIn PDF document text
    • https://emenu.hu/editor_up/xaxenaxadojowopiveguse.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/woteladarelelemewe.pdfIn PDF document text
    • https://windsbs.biz/files/file/runanifunisuwazoju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=mobile+legends+mod+skin+apk+downloadPDF 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_off0000afb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C9 10848 bytes
SHA-256: caa6f5f520a529b9f61a0c73b7524239070674ca15d10e1de6aa897630fefad0
font_02_sfnt_off0000e05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05E 14176 bytes
SHA-256: d0f0ce20352cb21bfb21903e20e6204079fcc62fa47e037a584b38d64489b38d