Malicious PDF — malware analysis report

Static analysis result for SHA-256 d761e9a431a7be26…

MALICIOUS

PDF

79.3 KB Created: 2021-03-15 05:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7107dda5ae531d0b66d834f5243f147c SHA-1: e91a34254de434203b498adc694cc8f46b57b510 SHA-256: d761e9a431a7be267cba6fcc2da9286c6928bedf6f1922d68125487be62d93ce
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized to appear as legitimate search results, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+is+the+duty+of+cabin+crew+in+airlines PDF link annotation
    • https://guferewefozitak.weebly.com/uploads/1/3/4/3/134393558/doritowozigisiv.pdfIn PDF document text
    • https://cdn.sqhk.co/fofasafiwi/huic6jc/27862471372.pdfIn PDF document text
    • https://zitasiga.weebly.com/uploads/1/3/6/0/136088478/014ef60f.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/hcDhihg/xubiwezenibatezatekot.pdfIn PDF document text
    • https://kedixusivazusug.weebly.com/uploads/1/3/4/8/134869684/4214026.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/81209849918.pdfIn PDF document text
    • https://gubilipolijig.weebly.com/uploads/1/3/4/7/134707964/58ded472ff8dc05.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/basic_physics_problems.pdfIn PDF document text
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/gazaxim.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_3bda44d2c0e4474bbf8efc76f403d1b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/79968257878.pdfIn PDF document text
    • https://0926596c-b1e6-4473-87d6-fed2e709bfeb.filesusr.com/ugd/e2a635_a0b4bf5eac90495e80c542eeb6eed9c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/lavekujovixebazibezaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/relationship_between_catastrophism_and_uniformitarianism.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/chromecast_extension_firefox.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/kurivelatovepokifizanisem.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/dobasasomodur.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/94495316760.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 5340 bytes
SHA-256: 72a6d26beb18337ff031271c1be790400e9a6fa9da15b3f753516f97db8fe06a
font_01_sfnt_off0000fcb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB4 10712 bytes
SHA-256: b4ec4a58f39f5ecc08d069974c057374c6a833e90dc26cd73d8772fe1cadd25d
font_02_sfnt_off0001216f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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