Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5a2f195f573cfd…

MALICIOUS

PDF

75.4 KB Created: 2021-04-26 09:58:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f8fdb5b5b94eb01a11c1d9ee019ce1e6 SHA-1: d3305ac96562b52ffaf9c13f26b01fb0a4d90efc SHA-256: 6b5a2f195f573cfd21726ce89048937bf5abe1793487386289d07ddbc544ff1c
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The embedded URLs and the ClamAV detection strongly suggest a phishing or malware distribution attempt. The document body, though heavily obfuscated, mentions 'newspaper layout design software', indicating a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=newspaper+layout+design+software PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4500878/normal_606b1ff03bfd5.pdfIn PDF document text
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/8735ab80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_603c73f5965d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_6014730446ccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_6025e5ba97ad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491936/normal_6057f4295e3e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414334/normal_5fd6e1de962a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464082/normal_5fdd6c4d6411b.pdfIn PDF document text
    • https://lefusovu.weebly.com/uploads/1/3/4/0/134040443/sujifi-kirevi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_6051a4cee2c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_602de3fb3d0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394072/normal_5fd80b80df144.pdfIn PDF document text
    • https://laxigotugib.weebly.com/uploads/1/3/0/9/130969680/jowimufugaluzugi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421210/normal_606e4a4f9dc5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408478/normal_601e5e3b272ff.pdfIn PDF document text
    • https://drodil.kapsi.fiWhenIn 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/783d9f10-a76e-4c65-a7a3-ad1ea18a2d41/how_to_clean_out_brine_tank.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/burger_king_calories_whopper_jr.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/bekufowusivaxibenuvev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a11ca5e-2c2c-4b7d-92d8-7fbdf97f369d/90391707009.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/54407609410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c78c323-13b4-4c6a-a62a-1128068b9f25/nutrition_careers_without_degree.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_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 5372 bytes
SHA-256: 9f5e1b26cd583c197afbe4d50a766ed27e8183b02eeefce442985fb1e77790d3
font_01_sfnt_off0000fc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC76 10492 bytes
SHA-256: 62ccde224a1841ab09c0c3362982132284615cc63c39f4c199be4a85cfdafcd3

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