Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7024a946d365c5…

MALICIOUS

PDF

100.9 KB Created: 2021-03-01 16:07:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0aa7fb5052ab7bc176a68f8f62ea1dc0 SHA-1: e70d7e4155ffa7e490b98802e915de881fcbf1cf SHA-256: ee7024a946d365c590d7f78a74a9c1eadb485512a78a743e8775e49e12d8b9db
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://lozipotod.ru/strik?utm_term=malazan+book+of+the+fallen+total+pages PDF link annotation
    • https://mifopubulu.weebly.com/uploads/1/3/1/6/131637027/223bb5a8fe76.pdfIn PDF document text
    • http://badgesverified.com/693571665162nltr.pdfIn PDF document text
    • https://rexakutomas.weebly.com/uploads/1/3/0/7/130739652/8624068.pdfIn PDF document text
    • http://moviesaddaa.online/the_number_deviluxwpi.pdfIn PDF document text
    • https://tevupiju.weebly.com/uploads/1/3/4/8/134865653/8aabd1.pdfIn PDF document text
    • https://vutojexi.weebly.com/uploads/1/3/0/7/130776275/bilowusa.pdfIn PDF document text
    • http://sibuvre.com/bozomuzikutowotawjs65.pdfIn PDF document text
    • https://genezekanoz.weebly.com/uploads/1/3/1/4/131413678/1578473.pdfIn PDF document text
    • http://theraisins.pro/spring_boot_jdbctemplate_inserthqj8u.pdfIn PDF document text
    • https://jawejeletisib.weebly.com/uploads/1/3/4/8/134886371/duwegu.pdfIn PDF document text
    • https://nofitipofawotuj.weebly.com/uploads/1/3/4/0/134012335/pubizodafolo.pdfIn PDF document text
    • https://bewotababuruga.weebly.com/uploads/1/3/1/1/131163836/gefugalukatu_makogulaxovufup_vafegitimekewu_razidope.pdfIn PDF document text
    • http://nakrutkavk.site/wf-2540_paper_jam_erroruj0ug.pdfIn PDF document text
    • http://bepibolet.22web.org/gujrat_pakistan_weather_report.pdfIn PDF document text
    • http://flymoney.net/does_duke_require_sat_subject_testsumr7v.pdfIn PDF document text
    • http://likelid.xyz/real_boxing_2_rocky_cheatslvkq7.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/in_the_heights_original_cast_musical.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fepujevuzal.rf.gd/curriculum_vitae_apa_format_example.pdfIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E9 5328 bytes
SHA-256: fb93a6f6e8c953e2fa2e3e0dfb31643e165d96d47ff1a159a4eb95061f2dda89
font_01_sfnt_off00013c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C22 11028 bytes
SHA-256: 11945773da7fb8078db93e4ec6fcb02a2b3fd53f96bbedcd61583dc3b63d496d
font_02_sfnt_off00016205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16205 16028 bytes
SHA-256: 3e66ce8c90719045bf8f6c8d5f716325bbce29c89c8399c9e71e7e90b46a9b16
font_03_sfnt_off0001764c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1764C 6084 bytes
SHA-256: 0bbd385887db5074fbd87256d70f98a882c9353f1362fd6c1377f0ce146e0394