Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c3212ab7f6b86e…

MALICIOUS

PDF

107.8 KB Created: 2020-12-22 02:58:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 39b374f2b2651c14fc2cdfc12e252831 SHA-1: 2e4bab6359a4248ad7859826170a01263ce104b6 SHA-256: 61c3212ab7f6b86e21b849d2aef38057ada16fbb13c0ddce60fdf712a3d1487b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to a suspicious URL that appears to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=fifa+soccer+ball+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5fc59fc281ae1.pdfIn PDF document text
    • https://fojumujitugesi.weebly.com/uploads/1/3/4/6/134688065/3075149.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467038/normal_5fc945c6a71da.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/pisuwovegodepewor.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/zebarufuridorur/8891297780.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/41545712995.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe02396d610986319788707/t/5fe11f41cc5fc459449f9d86/1608589121935/gakusizevawuporalek.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/teamviewer_mac_mojave.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/59408946642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2f0296-a362-4ae9-bb32-beafd127ea59/butoza.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/oakland_raiders_schedule_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/37467833746.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/brainerd_hardware_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb92c030-2546-4444-92cb-645a04ab4e88/19519166308.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/full_form_of_lkg.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/zidawadigegixabidok.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_off00015e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E9C 5244 bytes
SHA-256: 48a0923eaaf53283b7f04fa31d94a1e7c08a9630c277ea9444e5bf12ae1a52df
font_01_sfnt_off0001707d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1707D 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0001790b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1790B 12500 bytes
SHA-256: 3194f9df5beb8e9b832917aca57feafd0c9d247082a32f4eeaba56d233c37fa1

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