Malicious PDF — malware analysis report

Static analysis result for SHA-256 54031ed2c81af868…

MALICIOUS

PDF

74.4 KB Created: 2021-03-05 01:41:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: ca22aee80d886b7d5a9b43ceaf006354 SHA-1: 92ed83dd5de68d8e77851fda8375c320e6566992 SHA-256: 54031ed2c81af868691828d6a8306a9880fda1998c5deb6ad9dfdca2f5c4caa0
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating it likely exploits a vulnerability or contains malicious content. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. One of the primary links points to a URL that appears to be a lure for 'garmin 405 watch' searches, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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://leonvi.ru/wb?keyword=garmin%20405%20watch PDF link annotation
    • https://cdn.sqhk.co/sakiforivona/Ngdggjj/i_wanna_get_my_nails_done_meme.pdfIn PDF document text
    • http://xapiduxirob.mywebcommunity.org/how_to_connect_bluetooth_shower_speaker.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391896/normal_5fdca71bd99ec.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/8235737.pdfIn PDF document text
    • https://cdn.sqhk.co/kidirugolo/hhimegc/defamajubozu.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/55497887129.pdfIn PDF document text
    • http://bidizujimon.getenjoyment.net/theories_models_and_frameworks_in_nursing_research.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474192/normal_601c7589dd397.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/Bb3AgiK/micro_measurements_strain_gauge_selection.pdfIn PDF document text
    • https://vevikonupefafo.weebly.com/uploads/1/3/5/3/135391347/misok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487905/normal_600df174def1c.pdfIn PDF document text
    • https://vozoduxi.weebly.com/uploads/1/3/2/8/132815828/girimawofumiwugodon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450043/normal_5fca9359ead96.pdfIn PDF document text
    • https://cdn.sqhk.co/voguzasijur/LgcR5BD/idle_death_knight_companion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445882/normal_6034cc834562c.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/lepijozosi.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/place_value_worksheets_grade_5_cbse.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/how_to_work_out_chord_inversions.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_976672799105402b812a107bd12e9713.pdf?index=trueIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_354f795232274c409ad15f934668c996.pdf?index=trueIn PDF document text
    • https://eaa62ee9-779c-4a2d-9f50-6c66b019a99c.filesusr.com/ugd/1cc777_6a531b9ebc5241e68828b459c387626c.pdf?index=trueIn PDF document text
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_b6fa7c1af7134e299fbe0683f73d7e3e.pdf?index=trueIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_98d86a823bbc4c8cb2857729143363be.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 5304 bytes
SHA-256: 0156741e28b04bb62871e64f9cf14555de0b711a0dca31af800e26e75b9646a3
font_01_sfnt_off0000fbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE2 9584 bytes
SHA-256: dc3f1c421737300b092c377b568c5d561949c8efd9e20eba6f4c6335b67e3016