Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f45c724c554f94…

MALICIOUS

PDF

82.3 KB Created: 2021-09-15 18:42:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 812467ed872f97227244bb4dc66821ab SHA-1: 29bb2a33615d451a9f128801a50200bb55802655 SHA-256: 03f45c724c554f94e6abd99a34a0a6ed544fd34a5bb19e2b37bc2bf50a94eef6
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains a visual download button and numerous links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a phishing or malware distribution scheme. While no scripts were directly extracted, the nature of the links and the heuristic firings strongly suggest the PDF is designed to trick users into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://helder-effect.nl/userfiles/file/nemabubaguziza.pdf In PDF document text
    • http://bilateralmatters.org/userfiles/file/34461360464.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bf4cbc4645---xufulaxu.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/7442257882.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210913_A1722C8F945102E0.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/10470825032.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/roluponosoperize.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/zovajozebobat.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebf7241bf5---66044090914.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/nibopopumifumewitatoruvu.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/31397650466.pdfIn PDF document text
    • http://flemingdecal.com/uploads/assets/file/6952098151.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/nujepodijilasifegut.pdfIn PDF document text
    • http://frutapac.com/ckfinder/userfiles/files/bezejorel.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/jibarelalesolagujiriroxi.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/majiwixex.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/jaxurozazedegalinu.pdfIn PDF document text
    • https://sangolongphuong.vn/longphuong/news/files/bifetevowukasap.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/c2cabb15badbbd0da5d23db6d75c3dec/degiwerosozerazerupofo.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/acih2uhs35tqejj5btbnk26dmt/47595608299.pdfIn PDF document text
    • http://smogy.ru/files/files/depakejumasilewopuv.pdfIn PDF document text
    • http://gocchame.vn/app/webroot/img/uploads/files/wotuzani.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/45410975510.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/58464814597.pdfIn PDF document text
    • http://yuh-tarng.com/userfiles/file/fokolu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=life+as+we+know+it+full+movie+with+english+subtitles+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_off0000dc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2B 17600 bytes
SHA-256: b48ea8cdce1a51124f7fc7eefd5ce1f16d0f3a3bd968900c3f38b457c2bed4cb
font_01_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12192 11140 bytes
SHA-256: 46e68ab8adcd700435a9b793170ff68f18f47f4dde087fcc69e0c5b0d36a90f9

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