Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e9a84dcbbdd32e…

MALICIOUS

PDF

100.8 KB Created: 2021-03-21 02:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 20ad3cdc21ab5ed965768f781fcae0ec SHA-1: bd50fd22cd6b48c4883331fcc4d98fd6a6a32837 SHA-256: 14e9a84dcbbdd32edf8c9ae68906c65922f6d24c29130a1d494f62aa783228eb
194 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that likely lead to further malicious content or phishing pages, disguised under the pretext of providing a 'synonyms and antonyms list'. The presence of multiple external links on disposable hosting suggests an attempt to distribute malware or facilitate phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://baarspo.ru/strik?utm_term=english+synonyms+and+antonyms+list+pdf+download PDF link annotation
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/9ce3b.pdfIn PDF document text
    • https://resudejo.weebly.com/uploads/1/3/4/4/134471902/69a333e1.pdfIn PDF document text
    • https://gunobome.weebly.com/uploads/1/3/1/3/131398345/b8ac736c42aed.pdfIn PDF document text
    • http://smcjd.com/ctet_form_fillflh1r.pdfIn PDF document text
    • http://oneitshop.info/nojomatawidinaromojnekq4.pdfIn PDF document text
    • https://kaneloko.weebly.com/uploads/1/3/1/4/131408798/juvogopiwubepob.pdfIn PDF document text
    • http://sallles.ru/gewavugumupewapamilalcmj96.pdfIn PDF document text
    • http://docita.fun/what_are_the_3_theories_of_personality06q51.pdfIn PDF document text
    • http://csxmoney.info/13828505361zbxrw.pdfIn PDF document text
    • https://zufajutikeg.weebly.com/uploads/1/3/4/3/134355725/mosilaxa-busaw-lutojekew-lofisufe.pdfIn PDF document text
    • https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/wusogejuvatepibexij.pdfIn PDF document text
    • http://brosbass.com/libepowutaderuzozivuzoze6w10.pdfIn PDF document text
    • http://hangzhoumetal.ru/outdoor_code_posterdl6et.pdfIn PDF document text
    • https://safasisi.weebly.com/uploads/1/3/4/4/134472516/2818194.pdfIn PDF document text
    • http://goodshopsales.xyz/savubakaxwjt42.pdfIn PDF document text
    • https://vetinuvejozijuk.weebly.com/uploads/1/3/4/7/134745319/femizulopolutu-nofepujusufef-jofuli-nevafebibir.pdfIn PDF document text
    • https://zokesafan.weebly.com/uploads/1/3/0/7/130775675/7899942.pdfIn PDF document text
    • http://pogadai.xyz/reading_comprehension_sheets_ks1n3fsb.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/nufafifug0mibq.pdfIn PDF document text
    • https://remogomati.weebly.com/uploads/1/3/4/7/134748537/kagirekiniwaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0dd4521b-3e41-4083-9bcc-807cce03ae78.filesusr.com/ugd/cfe2e9_8bb0c65f684b4aa8a52dc4ca7b97d9f6.pdf?index=trueIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_5ce3f001c2dc4f9793a5b0bf9e5ea049.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_d80b770278584e8d8cfc35aa99b6b906.pdf?index=trueIn PDF document text
    • 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://scripts.sil.org/OFLIn 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_off000136be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136BE 5508 bytes
SHA-256: ed2c240e4c3e0f24dd1611ba986d5f68aa51c497cb51db112deb10f62ef5272c
font_01_sfnt_off00014978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14978 11288 bytes
SHA-256: 334ad3512fb5471f33d22a0858620cce48bf216eb8ff529c9c22945272a8ebe4
font_02_sfnt_off00017011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17011 16172 bytes
SHA-256: 461a1578f80084b2f2ca998a6e716936969cc9b33b2976d66eaaa57f6abee57a

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