Malicious PDF — malware analysis report

Static analysis result for SHA-256 594a30bb5b6b9993…

MALICIOUS

PDF

76.6 KB Created: 2021-06-05 05:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f7393148395c148191978ddd6517f834 SHA-1: 91c0cd52f31d31434fee65cf606a3524c3970d7e SHA-256: 594a30bb5b6b99935ba1f2fc109f347139790a88d98ae5ea631ddf5586d7e292
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains a large number of external links, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, contains text related to 'amharic keyboard on mac' and 'wkhtmltopdf', likely a lure to disguise the malicious intent of directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/pbw?utm_term=how+to+use+amharic+keyboard+on+mac PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4416811/normal_60b5ca3c1206a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_5fdc6b7876faf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_6013afd0a2936.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501791/normal_60690f182f42b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424378/normal_60b9f77ac71a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_5fd7e41036071.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447263/normal_6041e2b623913.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445119/normal_6057dec5e9ba9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fd856e9ea3cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_602720c2774e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_6032b8d3e2b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455176/normal_6047f1c964070.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382773/normal_5fd1c6e228fc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5fdff6ca1fde5.pdfIn PDF document text
    • https://vilewufatavak.weebly.com/uploads/1/3/4/5/134585542/45ba1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450890/normal_5fedd766d520a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_600fc07080843.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4471455/normal_60b2363b6e16c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_6068199778303.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392209/normal_6031b547348ea.pdfIn PDF document text
    • https://xesawamerubipox.weebly.com/uploads/1/3/4/6/134629950/8555a8485.pdfIn PDF document text
    • https://fedubipogumuwu.weebly.com/uploads/1/3/1/3/131379546/kugusijokisifuvowo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412897/normal_6002758d25d45.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/30819a66-b990-4d3b-af51-f56dcc2953d3/49483855595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc7a6a0-c75b-456a-9214-1ded4cd1ad10/oscar_et_la_dame_rose_chapter_4_summary.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_off0000ed16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED16 5504 bytes
SHA-256: e1e43733a3b26b7a958da1146290e9acba2bdb8020dbc099ee0e2772d3c2e794
font_01_sfnt_off0000ffb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB3 10976 bytes
SHA-256: a91867c2991bcd1f894db77a9075c1f6af42113ef2087e414a1e9e41f73a2764

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