Malicious PDF — malware analysis report

Static analysis result for SHA-256 564b43b40a1c4dbc…

MALICIOUS

PDF

112.0 KB Created: 2021-08-08 05:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1f817056794fe4db3ded8dd465ad5c4f SHA-1: f47dba819ed7b07441c862e29a88d4ec9d266dae SHA-256: 564b43b40a1c4dbcbfbbaf800f1485c90c0c32edf55d81042fe78a047b448fd4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL findings point towards a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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 https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f12c54c30.pdf In PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e31923915f---29170174448.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/mipiwerijufafas.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/08be4eee802d4c9830ee5cbd15bde878/8017844335.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/kawebofezugatisuvakifubi.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b9314b938---78521235318.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf7f9b496c---kebiba.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/pulob.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/nadujijizapixixuvowebovo.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/0e85c117470d28e53de82f1bcf73db62/57240286731.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/6000789339.pdfIn PDF document text
    • http://southwest62.com/clients/6/66/666176aa584decdbf8d0f1e9213c5ee1/File/lajokawitaj.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/4b5cd3f633efdea2463ea95dcc49e352/kamixosododo.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b9d018546---70723615206.pdfIn PDF document text
    • http://wonsakai.com/uploads/files/45330381454.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/33879104853.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/79d456ad6eb9a5b79302ea7493785198/roteferuwosurafowi.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/sifod.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9e357672e6---bonadozaguli.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/edvikiai3ggpq9obc0apeslen6/60472837319.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/gapafurizilebijabokobaku.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b48295e279---34353533055.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/69730196887.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/2qcjg1j9qvb2ekk0bqstmvf8hv/85136333169.pdfIn PDF document text
    • http://kleiberit.ru/files/file/58416397773.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=angry+birds+evolution+mod+apk+happymodPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011454.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11454 23700 bytes
SHA-256: 82f07c51cdb5883708c1e53a70c6eb21fa764f76cb5ec53937c65d18373c03b0
font_01_sfnt_off00013e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15683 11332 bytes
SHA-256: 486202421024dddde659e843bf02d46485e80f4e9b6326e797d6159cb51cce3e
font_03_sfnt_off00017093.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17093 2400 bytes
SHA-256: af547ebbdab63e4a8452dc6a2fa2a8fc33aea6d3958b4707eeaef803194084dc
font_04_sfnt_off00017b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B04 22392 bytes
SHA-256: 26f2a1f3a2b67797005ce82e83782064dab0b41fcb0479e05d8db1f6f317815f

Open this report in the interactive analyzer, or submit your own file for analysis.