Malicious PDF — malware analysis report

Static analysis result for SHA-256 789031a744016a40…

MALICIOUS

PDF

78.2 KB Created: 2021-02-15 07:28:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4a55039459c27ec9b99748fc00adf6bc SHA-1: a8b11cb31983624e7c6ec72bf87d3fca08a377f7 SHA-256: 789031a744016a40f6b311643db2cad1d9ad1e3430b6c2facda02ac001190110
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of numerous external URIs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://maypoin.ru/123?utm_term=lg+dishwasher+ldf7920st+installation+manual PDF link annotation
    • https://toralalog.weebly.com/uploads/1/3/1/4/131436966/pelivoravogogi.pdfIn PDF document text
    • http://unityfree.xyz/61576501417l7v7x.pdfIn PDF document text
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/4270906.pdfIn PDF document text
    • http://cardioactiveitalia.site/hero_jump_gameho7v5.pdfIn PDF document text
    • http://bobr.space/atharvashirsha_lyrics_in_marathismvz2.pdfIn PDF document text
    • http://rankingcoach-seo.com/diablo_2_druid_stats_guidef1hid.pdfIn PDF document text
    • http://vienvozvrat.site/juzojokopobamisiloxiplai1b.pdfIn PDF document text
    • http://virnet77.ru/kumobasepevar23il.pdfIn PDF document text
    • http://com-connexion.xyz/35167445955uf7qv.pdfIn PDF document text
    • http://ferejupaxebul.iblogger.org/motu_patlu_tamil_cartoon_free.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/jemefetawul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/51097251322.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/37554506958.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/41583987255.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/47414190192.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/tamil_calendar_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/auto_page_break_in_jspdf.pdfIn PDF document text
    • http://kitalanexu.epizy.com/gate_fold_template_publisher.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/87019658906.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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 5864 bytes
SHA-256: 638fcc845cda5fa765f2682d5753c4036ad2fd2e1ca5dd60746a043a9ccca6f5
font_01_sfnt_off0001065b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065B 10800 bytes
SHA-256: 1c846c2d1c8ab2322b2f771564981bbd6b5ca981d330e7e7e677760bdc039e6d

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