Malicious PDF — malware analysis report

Static analysis result for SHA-256 739338a6b1e6e086…

MALICIOUS

PDF

81.3 KB Created: 2021-03-16 01:36:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 739573472e2080b452d15e6d8895d4fc SHA-1: 7bb24d0954bd11619024eb964b17ade5cc09b5fd SHA-256: 739338a6b1e6e0860b0f705e205de42ec9142b063b599dd024371cd3c371d7cd
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, likely to a link farm, with the primary URL being https://soxebez.ru/wix?keyword=monica+geller+wedding+dress. This pattern is commonly used for phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links points towards a malicious redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/wix?keyword=monica+geller+wedding+dress
    • https://pimazapodozem.weebly.com/uploads/1/3/2/8/132814260/6419716.pdf
    • https://cdn.sqhk.co/tupipitijil/e76a5jg/62243702354.pdf
    • https://cdn.sqhk.co/kusuteji/db1hdhj/85108715391.pdf
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5fe7eabe07014.pdf
    • http://wilozobugo.iblogger.org/70867779928.pdf
    • https://cdn.sqhk.co/wuwexosul/hbibFha/cdc_survival_rate_update_covid_by_age.pdf
    • https://mapokelamoda.weebly.com/uploads/1/3/1/8/131856574/2aeaf076.pdf
    • https://negofajosodin.weebly.com/uploads/1/3/5/3/135314147/denel.pdf
    • https://static.s123-cdn-static.com/uploads/4455180/normal_5fedc3cf42e93.pdf
    • https://cdn-cms.f-static.net/uploads/4379491/normal_600b65d195a85.pdf
    • https://cdn.sqhk.co/zamodozitip/gjMWIgi/toxanagira.pdf
    • https://cdn.sqhk.co/zivalutapa/xvgclOe/19843637108.pdf
    • https://cdn.sqhk.co/jiluputumusi/igfajbE/cladogram_analysis_worksheet_answer_key.pdf
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/cb1e2049.pdf
    • https://static.s123-cdn-static.com/uploads/4485005/normal_5fe293b171165.pdf
    • https://cdn.sqhk.co/tuseliwi/aggidMC/pivuxuvanumesovemu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/safago/r._h._charles_the_apocrypha_and_pseudepigrapha_of_the_old_testament.pdf
    • https://s3.amazonaws.com/budovewesekaz/57942884121.pdf
    • https://s3.amazonaws.com/salosibejodod/41834875173.pdf
    • https://s3.amazonaws.com/befafuni/burung_anis_merah_gacor.pdf
    • http://majilutiwuxas.rf.gd/janolujenivowaniworepo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ffff.bin
3ea39f1decd6330fd5384bf039abee5539772da5b900021ed8d4e369ef08ddcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFF 5204 bytes
font_01_sfnt_off000111dd.bin
5f8645687a8c20e6c9042062ef1492544ffa408f45d7d9319fe378427a99e01a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DD 10884 bytes

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