Malicious PDF — malware analysis report

Static analysis result for SHA-256 a969e254d721a627…

MALICIOUS

PDF

68.6 KB Created: 2021-09-27 20:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9856cfe0a15fca1dfa1592273fb3b76d SHA-1: 67d0807a2ff4212361fea0e313637ec2af6b4bd3 SHA-256: a969e254d721a627bf7d88a33b567cd82865cf6029ceee00a2b2bc950c898593
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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.
  • 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://aktifithalat.com/resimlerfiles/42239718221.pdf In PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cef3173abf---fowoxuwukokujokab.pdfIn PDF document text
    • https://dol-rtknetwork.com/uploads/files/78258335111.pdfIn PDF document text
    • http://wxeina.com/userfiles/files/bevozinorezusugom.pdfIn PDF document text
    • https://fptica.ru/images/file/19798787435.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/wadujidevegokizisutepaxek.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/kigirivodotebex.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/15799501852.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/75911364865.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/lezafizewix.pdfIn PDF document text
    • https://anesaportugal.org/upload/file/joximovadizezexuw.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/52782863131.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/28818012976.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/94098467965.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/dezekasor.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/aa50252dc4a4bf665002c74a81cb6258/lidax.pdfIn PDF document text
    • https://marthomaktrplrdiocese.org/ckfinder/userfiles/files/46324832174.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/9620629862.pdfIn PDF document text
    • http://asupuro.com/upload/save_image/files/64228421486.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/xemajaduwosife.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/31723491887.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/64451869963.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613179110aa50---42772981027.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/98157507997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=roblox+2014+download+androidPDF 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_off0000adc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADC1 10588 bytes
SHA-256: c8e64df61ef5ee22326fba7ad1511d7db76aed724235406d03c1bff15cda28a9
font_01_sfnt_off0000c625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC625 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE37 15156 bytes
SHA-256: 85763ae4025357d3b8e5d2809499e9c0692dc735403cbbdf27507cfbd4a519d5