Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47a57f31bda052c…

MALICIOUS

PDF

87.9 KB Created: 2021-07-07 22:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 5d13a9e872b1ddb75b8a5948d9f8927b SHA-1: 17a06d6896fc2819d8d00edd0be6a20a34e0763c SHA-256: a47a57f31bda052c0943a9feb81b8f68d0fc72f3a495b30717f45cca3cbe9a07
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a link farm and a visual download button suggests a phishing or social engineering attack, likely aiming to trick the user into downloading a secondary payload. The URLs extracted point to various hosting locations, some of which appear to be compromised WordPress sites, further supporting the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://nuestratierrapremios.com/campannas/file/77814772538.pdf In PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707f3cc958f---71395320162.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/kkafst5p0k00037mhg5phjk195/98542365708.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/42467484046.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/valijojurezabato.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/fubirelodajasijowi.pdfIn PDF document text
    • http://opakowania-loga.pl/zdjecia/fotki/file/rotidakiwa.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7f694f2d---bewijagidejukinibugurim.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/popexuk.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/fepeginamulilapiges.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160d9ad2fe17b8---zumabakegobepukux.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0d0707518ece27cc7002672d1db7300c/34787583048.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/25d830ab131107d7cc98f7ddf31846e9/gojafivozobojimeso.pdfIn PDF document text
    • https://davaocarrental.com/images/file/pesilarabakexifu.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608642807babb---monasamilarumibuzefe.pdfIn PDF document text
    • http://lucann.com/Upload/file/wumijimevizikobotal.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/pumotimomepexirise.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160747fa5379b8---rusulilugonugezemipa.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/84f46306859cb5c47c12bb2d70c012cc/11115357357.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c6161b0605b---62254409936.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/cf0d47fbe0082b020e68e68a207772b8/31505085266.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/gibepiz.pdfIn PDF document text
    • http://chinalabware.ru/d/files/62813989687.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=games+like+minecraft+online+free+no+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 16940 bytes
SHA-256: b77f265b94aa3f6fec4f2f91fcdbee766e6b2b5622bc4c2712af4c0a9a2c5d4e
font_01_sfnt_off000120d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000138ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138ED 10856 bytes
SHA-256: 2ef5dd4f3e280367cee2018cb18d714b41fe5124f08f0dd7c30f0ebb7ab9f28a

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