Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4c865cb531ab4f…

MALICIOUS

PDF

68.8 KB Created: 2021-09-30 13:51:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 376a5ee925c1035661a994092d7e1e31 SHA-1: 75296a09152de57520fd8630a6a8c8614be05e72 SHA-256: da4c865cb531ab4f5af3ad531f6e3d659c97fa5ff88452be37f9b439e4e6aeee
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, including a high ratio of images to text and embedded links to external sites. The presence of multiple links pointing to compromised CMS uploads and disposable hosting suggests an attempt to redirect users to malicious content. Although no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious intent to trick users into navigating to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • 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.
  • 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://handgun.ee/media/file/70347212370.pdf In PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/1c0c85626ec070d55e2dd3c84e58e02a/nunojabedofujubas.pdfIn PDF document text
    • https://dudikom.pl/userfiles/file/12475857810.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/h60fd1a51b5lumr7c5esl1f3rj/vuwetikatu.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/jebarevivulinokik.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/23ac8384394594af4ab556d2e31fe0b0/32794168756.pdfIn PDF document text
    • http://21cedu.com/pds/userfiles/files/95378236852.pdfIn PDF document text
    • http://minhanh.com/files/dimawu.pdfIn PDF document text
    • http://pharmorgsyn.com/upload/files/telusupukebugowoveji.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/03b9a3c60f45936ca9eb01a23eb5b818/24696283228.pdfIn PDF document text
    • http://longtra.vn/userfiles/file/27011374954.pdfIn PDF document text
    • http://innersolutions-uk.com/file/zizexitutiwunida.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/vogodeto.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/35376528544.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/27015210476.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/nexusalutadajunogixanes.pdfIn PDF document text
    • https://ausztriasi.spawellness.hu/upload/hirlevel/files/90886171829.pdfIn PDF document text
    • https://atlantidegattico.it/file/tikak.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/37927782100.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/6684229909.pdfIn PDF document text
    • http://www.sintsprev-ms.org.br/ckfinder/userfiles/files/menaredebuwomos.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/xunetixukelalamuxajotuk.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/xowezepojire.pdfIn PDF document text
    • http://italianopizzeria-pg.com/uploads/files/17012029303.pdfIn PDF document text
    • http://szkolaprywatnaleszno.pl/userfiles/file/86550128206.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=2k21+android+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_off0000b33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33D 10096 bytes
SHA-256: 1ae90279b59b50673dd61410de64e0d5e9f681b0b1a51ed0e601ee19c35cc91c
font_01_sfnt_off0000c9e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F3 14400 bytes
SHA-256: 81248f437837d243b038d2d4e9559506a8dcfa66f3a46396b6933c52af29a7e2

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