Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf88bf1a7b9ba76c…

MALICIOUS

PDF

63.4 KB Created: 2020-11-12 12:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2eb729a43a46cf9f8a8e13536b75eb75 SHA-1: 42dbdfacff3ebcb5923c332eb3f0193d863e3e2c SHA-256: bf88bf1a7b9ba76c4c2af5274c836ada60ec9d3d239202937a1b8e7faba495d7
104 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The presence of a download-related heuristic suggests a lure to trick the user into downloading a payload.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/strik?utm_term=alphabet+poster+printable PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f8ab9f9ad167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370263/normal_5f9b9dd14afee.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kekikefuwu.pdfIn PDF document text
    • https://bopiwode.weebly.com/uploads/1/3/4/3/134367631/9e8269f14a3fc.pdfIn PDF document text
    • https://kuzasafeg.weebly.com/uploads/1/3/4/5/134586407/fowute.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/divelatoxa/wijojevidabinitetimuwoza.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/dragon_coffee_table_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/jikemixoroniximizel.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/54262123655.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/juvixito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e9b28ce-3b8d-4481-bd15-8100f7de34e1/tafakevemefuteba.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_off0000be48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE48 5036 bytes
SHA-256: 73d852523ce9396e4b7bb94dbf5db65a6fdc88384c00439cab3887e5927acd80
font_01_sfnt_off0000cf56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF56 10164 bytes
SHA-256: e8498bf1eacc8781b1a93cc231fcc4dc7fcf76ab4651fd2679c1d71d3c5861b3

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