Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a2709106f54a046…

MALICIOUS

PDF

90.2 KB Created: 2021-09-17 09:37:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1f3d2386d708e003252e7d5a8a9e33a6 SHA-1: 1824707c329a604a44838104a03a3956df239d0d SHA-256: 3a2709106f54a04673859934c45b928521ec2e8d2fcb77a9484e23c1709e67ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to unknown domains, suggesting it functions as a link farm to direct users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/23782762757.pdf In PDF document text
    • http://tongshengchem.com/ckfinder/userfiles/files/97484839206.pdfIn PDF document text
    • https://tigapilar.com/upload/files/48409844551.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/ralefifovowodinopegifoko.pdfIn PDF document text
    • http://tydafa.com/dafa/uploadfiles/20210908074849.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/38237960708.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gobemedaguvosazexeluvofeb.pdfIn PDF document text
    • http://jysfh.com/upload_fck/file/2021-9-16/20210916012444588542.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/52481189917.pdfIn PDF document text
    • http://vntattoosupply.net/uploads/image/files/18833848193.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/fitisipoxikexotixiju.pdfIn PDF document text
    • http://avstralianature.ru/ckfinder/userfiles/files/3537994460.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/wejenazonemalaluzowota.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/maruwowefasuwir.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/43452806486.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/gavibesogunonuzemufirux.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/71373464399.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/jowozigar.pdfIn PDF document text
    • http://candybeauty.vn/upload/files/93261264233.pdfIn PDF document text
    • http://planbmedia.hu/files/mukebar.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/70869712127.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/kifavinonaboti.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/33211345906.pdfIn PDF document text
    • http://crestviewshopping.abwingsmd.com/uploads/files/notisugubekiweli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=temple+run+html5PDF 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_off0001002d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002D 10172 bytes
SHA-256: 423c7d2b926f3205331295727aa115b5f257510261fa6e45c7795d34abe47f81
font_01_sfnt_off000116bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ECF 17148 bytes
SHA-256: 9146fbcbd8b657bc5ddb8a7de1ab2114196bc762cf7252c1f6b57c9f953f1b43

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