Malicious PDF — malware analysis report

Static analysis result for SHA-256 96962ae584b219b8…

MALICIOUS

PDF

85.5 KB Created: 2021-09-14 04:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e3a22fcbf230e476f804b9df8e43722a SHA-1: 6a1d317c2fd28711f201c6be4aeb32c6f1bc201b SHA-256: 96962ae584b219b85f8120630511e65592c44186baa5c3ffe40350bb33cc776c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to redirect users to a collection of other PDFs hosted on disposable domains. While no scripts were explicitly extracted, the nature of link farms often involves JavaScript for redirection or obfuscation, hence the inclusion of T1059.007. The presence of numerous unknown URLs points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://bselink.com/userfiles/file/tiwawakize.pdf In PDF document text
    • http://syekp.gr/sites/default/files/file/palewutefevijipinuko.pdfIn PDF document text
    • http://sdds.be/userfiles/file/84691488669.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/futoredimolofutejubiv.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/81886973804.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/pazupozovur.pdfIn PDF document text
    • http://architectureanddesign.it/userfiles/files/19011029106.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/wumilujebuduwarewup.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/82513de0aa5b6c3596344c657ba2f571/77488497991.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/59708511263.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/30443756795.pdfIn PDF document text
    • http://abpjse.news-read.com/upload/files/97549504805.pdfIn PDF document text
    • http://abwrosedale.com/uploads/files/mozisukejotubazodiler.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/1650646683.pdfIn PDF document text
    • http://stavo-bazar.cz/userfiles/file/22745792651.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/66261870426.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/14637144746.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/muvebebo.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a8d16a1c1---wevarubewafazozarakavuluj.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/ligosudelibavowolinazimin.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/17341262014.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=data+science+from+scratch+2nd+edition+free+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_off0000e8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100F1 17432 bytes
SHA-256: b3da695180b776c628697725268f0b67fa71ec4ad421225361bde819ac168eb4
font_02_sfnt_off00012e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E9A 10948 bytes
SHA-256: de393a97b5ff45f925ac6c4cc7516b5fe77722297c923664586f2e60c152560a

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