Malicious PDF — malware analysis report

Static analysis result for SHA-256 428ce7d6d6e05f13…

MALICIOUS

PDF

74.2 KB Created: 2021-03-22 16:34:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6e685d8558c4d3cea8a514308fe59ca1 SHA-1: 7d68fa5d304eef1046d59afdee1074ea22f6b706 SHA-256: 428ce7d6d6e05f134be3a76293dbd0111b58527e4c4ef1e0dfb53794416bfc35
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics suggest the PDF is intended to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=ms+office+for+mac+student+free PDF link annotation
    • http://rm-swis-mine.com/lenovo_t420_laptop_release_datennic3.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/6564510.pdfIn PDF document text
    • http://metalllift.ru/tutoring_flyer_free_templatel6y4o.pdfIn PDF document text
    • http://localdesign.me/chiku_chiku_boom_songdbpz3.pdfIn PDF document text
    • https://judexesadizit.weebly.com/uploads/1/3/0/7/130738912/c85611f16f0.pdfIn PDF document text
    • http://nogeturafo.sportsontheweb.net/50761804769.pdfIn PDF document text
    • http://mufadapi.22web.org/jabewexax.pdfIn PDF document text
    • https://tukumexof.weebly.com/uploads/1/3/4/7/134721389/9653829.pdfIn PDF document text
    • https://xuzubakew.weebly.com/uploads/1/3/0/9/130969304/pebugifadewumeruz.pdfIn PDF document text
    • http://phulop.store/7790947241067j85.pdfIn PDF document text
    • http://1xbet-registrat.site/5274178938012aev.pdfIn PDF document text
    • http://strapslap.online/chandramukhi_movie_full_hdg4wud.pdfIn PDF document text
    • http://infokurs.design/stretching_anatomy_arnold_g_nelsonhukeo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b436aaae-a7b5-4b87-b069-b1a486d25a18/how_to_day_trade_forex.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/nibevulamujudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad388300-1de0-4be9-a594-b10d1979b57c/how_to_use_universal_aircon_remote_control.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/853f4a84-9b4a-45ce-a0a6-749bf07a6ac1/53516802284.pdfIn PDF document text
    • http://ruxozuxikoba.rf.gd/50022711232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1187c328-c70b-419a-8007-578937689d04/wirif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3560605c-2fa5-4721-bdbe-f1686ca6f8d1/dd_5e_warhammer_versatile.pdfIn PDF document text
    • http://fewabawunidud.epizy.com/wepibabaj.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51A 5140 bytes
SHA-256: ce89a69e4b5ef196d2f58f969178a5f4f25eb52b2671872960a7229019019424
font_01_sfnt_off0000f688.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF688 10896 bytes
SHA-256: a2b757cd47b8e99506fdd86a01563bef05f7145cb0a08ce784f92aeb4be04706

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