Malicious PDF — malware analysis report

Static analysis result for SHA-256 705744bf9017d56b…

MALICIOUS

PDF

88.7 KB Created: 2021-08-22 01:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: a61907c5eb5bd6b2145c88a7f84f74d0 SHA-1: f5d44d6d496a1cbcb2dee2effa1fb64c35acc0cb SHA-256: 705744bf9017d56b592ba406066914f8150bc5ef05660260010e3967463128a0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were extracted, the presence of a PDF AcroForm button with an action trigger suggests interactive elements designed to lead the user to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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://chalappuram.com/userfiles/file/sodutepil.pdf In PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/fezukadavazapane.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/11723270085.pdfIn PDF document text
    • http://iphonedown.com/ckfinder/userfiles/files/mazanup.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/74ai886cc6f8dsrnpqq8eimef1/fepalesurajamazidibo.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160885ed511040---70674639314.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbca1f2d180---kiginixiraz.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160942d8be3dcd---99098806661.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/ca0e14df1b9aa75ce628110d03a36922/23408834302.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/d6795508d5bb85022ad31409a4b2cc60/gegomukafumifakedanepis.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/448226ba0c4872afef9788ad2386972f/jowixipodunaxuva.pdfIn PDF document text
    • http://ambvetfanini.eu/userfiles/files/vaduritogoletaxatut.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d1e5347c---merafarin.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/turotipewifi.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/lopokuzuzuwidadap.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f32221b2de988959f74cbf2db80a9cfc/laboxevifabose.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/muzewenewu.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/ca8ea0e5df820bda5bbf216eda97da3b/wonibikupoxavimanizofe.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/bagolebubijexa.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/roxekewanume.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9cc5338ee6---81142214741.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54632384836.pdfIn PDF document text
    • http://mp-journal.com/media/file/burol.pdfIn PDF document text
    • http://wearefamilypalestine.com/clients/3/3b/3bc38fc23f9ffb54b20226cbd6ad6ce3/File/51830002504.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=lista+de+verbos+transitivos+e+intransitivos+en+ingles+y+espa%C3%B1olPDF 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_off0000f169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001097b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1097B 18148 bytes
SHA-256: 5c7dd0836a198666b950935fb871520948dd83ae52db43f3417cdc3526d8e12c
font_02_sfnt_off000137cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CD 11048 bytes
SHA-256: 9c3a4cf92fde81554e21d7f3e0272d28bcf1805e3f23b5e7cc7eccc4dcf86930

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