Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30b6a7fcd3e0ff4…

MALICIOUS

PDF

77.2 KB Created: 2021-03-22 06:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a80201fa7d1f996c9fd09205e2f52fea SHA-1: 16ae62242234cf31c4131d3db571338dcda12411 SHA-256: d30b6a7fcd3e0ff447c05fdd85f9648b8ff0b98d780e0a6f01d4e05590683780
196 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be a precursor to delivering a password-protected payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://dafemum.ru/123?utm_term=annamalai+movie+songs+ringtones
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/wuguvimukidedomado.pdf
    • http://vakogaxaja.iblogger.org/disimobodusonexudekiwo.pdf
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/479571.pdf
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/4427680.pdf
    • http://tomolijoponix.mypressonline.com/hymns_written_by_annie_johnson_flint.pdf
    • https://gogodelile.weebly.com/uploads/1/3/0/9/130969080/dae2cb.pdf
    • https://cdn.sqhk.co/kunimanujage/geGGVhg/lonilugufigizedax.pdf
    • https://posilopawirina.weebly.com/uploads/1/3/4/3/134353572/sudofutarizupujas.pdf
    • https://cdn.sqhk.co/tuxisilogok/Gwjgihj/33553824279.pdf
    • https://cdn.sqhk.co/tipefimex/idAjbjb/jupiviwetivemeragug.pdf
    • https://cdn.sqhk.co/gituridewo/fGeiahi/38077783583.pdf
    • https://cdn.sqhk.co/fomavulobet/J7VNggY/94808579978.pdf
    • http://fopokigife.mywebcommunity.org/sozaxow.pdf
    • https://cdn.sqhk.co/pofaxiniraz/ghfhgif/87685280712.pdf
    • https://fomimelagesuto.weebly.com/uploads/1/3/1/4/131406840/f987de974c.pdf
    • https://cdn.sqhk.co/denirinodo/ja4ecjc/how_to_use_snap_assist_tool.pdf
    • https://cdn.sqhk.co/pulovafafita/gggdggw/mopewulexawidamoxusin.pdf
    • https://vepakuwaderim.weebly.com/uploads/1/3/4/6/134699920/dd3cc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rezimezamuz.rf.gd/catalan_english_dictionary.pdf
    • http://wikilupari.epizy.com/interview_form_format.pdf
    • http://litopuputorer.rf.gd/97975019197.pdf
    • http://wavexijazibivat.myartsonline.com/ugc_sixth_pay_commission_report.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_off0000f0f8.bin
64f847ed684441c960340d8c503d336af8a84d0d8225abfb16908eb2fcac49b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F8 5052 bytes
font_01_sfnt_off00010215.bin
71ab725e6247e19501201ec03ec209c83d467e4262273a500e96b52c9772975e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10215 11048 bytes

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