Malicious PDF — malware analysis report

Static analysis result for SHA-256 2889f84c3a1d5f4d…

MALICIOUS

PDF

81.4 KB Created: 2021-09-06 06:15:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cd42f4f6b76c8f3dc01884ca294835b9 SHA-1: 958dcbeaf89a07fba95e9fa65c899a8a8ed40213 SHA-256: 2889f84c3a1d5f4db63e3b94f260436a0b6de47372f44850edea25e35d49acf1
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and link farms suggests an attempt to distribute further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pololanna.com/user_img/files/suduropofara.pdf In PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a692bd4f1---86079434696.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/vobmcgas82djcc09brc0shpt07/tuzodivekivegojaxevap.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/79ec5d6506f3a56416d0c6ae437a08e9/pixiwir.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/8e56a628a776452696f1604a6eb7a2c7/89819593241.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6b591c6ac---lumala.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16071d1a6e9b8e---raloxawinezutekepajimi.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/3erpi1fn6nh54kqndcfqoac47a/xapok.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/panafo.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/40536478613.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/bisivoxoteg.pdfIn PDF document text
    • http://ark-mr.com/data/home/qxu2063190031/htdocs/uploadfile/files/texotom.pdfIn PDF document text
    • http://tradotel-riviera.com/file/femagizumuxalig.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/78217526732.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/gexoke.pdfIn PDF document text
    • http://rc-modeller.se/images/file///wazawoleb.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/82146440859.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/budiwafagun.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/wamotofifoluxanukipavan.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/a558069669f3e86ad602e9ef8f00fd4e/mafuperibex.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/fuludutavotoxefapesesom.pdfIn PDF document text
    • http://holzweiss.at/34443908101.pdfIn PDF document text
    • https://emtracing.net/userfiles/file/kuzowawuguk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=economics+worksheet+economic+systems+and+circular+flow+answer+keyPDF 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_off0000d849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD849 17444 bytes
SHA-256: a153c0da841b232a2d08bdb467bd9cdd69bd5f47929b96b6f1e9aac405508f97
font_01_sfnt_off00010551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10551 11116 bytes
SHA-256: ca797bc596009ee8de1f875c5e40df60ac2b6264d0837bd6311edccabc623368
font_02_sfnt_off00011f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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