Malicious PDF — malware analysis report

Static analysis result for SHA-256 8903ce1319b02201…

MALICIOUS

PDF

77.1 KB Created: 2021-03-30 03:00:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 95a8216e8bc90da88b1636596dca8e05 SHA-1: 48f63d6453f916adef02d0013cc747fffbd068c8 SHA-256: 8903ce1319b0220145ef4e8153882080f9be715e07f038a7e03c07bc80ea28c3
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

This PDF document contains embedded JavaScript and a large number of external links, many hosted on disposable domains, suggesting it is designed to redirect users to malicious websites. The heuristic firings indicate a link farm designed for SEO manipulation, likely to distribute phishing content or malware. The embedded JavaScript and numerous external URLs point towards an attempt to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=how+to+solve+a+rubix+cube+step+by+step+wired PDF link annotation
    • https://cdn.sqhk.co/tovipovo/gjigjdX/67652806472.pdfIn PDF document text
    • https://dizalojowu.weebly.com/uploads/1/3/4/8/134866254/vizowuzunidatovumo.pdfIn PDF document text
    • http://vofovadero.22web.org/app_to_annotate_online.pdfIn PDF document text
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/wamenumoz-gudasuxonemar.pdfIn PDF document text
    • https://cdn.sqhk.co/wiwevini/5gcoWn8/bird_life_list_online.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/rumidi-tukakomiwe-fojut-pefosamomefujen.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/learn_japanese_language_through_english.pdfIn PDF document text
    • https://piwebodowumogoj.weebly.com/uploads/1/3/4/8/134857209/jizudifokon.pdfIn PDF document text
    • https://kepigepejabuji.weebly.com/uploads/1/3/4/3/134315220/xabol-sazuke-jatabigi-girifavo.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/bf63d35baf9f20.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/d5e1fb8e.pdfIn PDF document text
    • https://tejukikefuxod.weebly.com/uploads/1/3/4/7/134703803/powiruforope_tazupijodiva_konosib_remotuna.pdfIn PDF document text
    • https://xekitagib.weebly.com/uploads/1/3/4/6/134668592/4233764.pdfIn PDF document text
    • https://fubagodesipura.weebly.com/uploads/1/3/4/3/134326772/biwenajivoke.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/6847503.pdfIn PDF document text
    • http://fepaporipevari.mypressonline.com/80952597514.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gexilel.rf.gd/doxatujevozu.pdfIn PDF document text
    • http://sixiwojiti.epizy.com/channa_mereya_movie_punjabi_filmywap.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/acknowledgment_sample_for_thesis.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_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 5492 bytes
SHA-256: e8d17b38e7497c236c0484700d9ace9b4dba357a8476e41265ef589c33bdbd51
font_01_sfnt_off0001009a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009A 11140 bytes
SHA-256: 19c8f9d04dc70392bbc19350fa4418b1ef59780303694e999b512f42d816100b

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