Malicious PDF — malware analysis report

Static analysis result for SHA-256 b087389b8299d0b1…

MALICIOUS

PDF

70.8 KB Created: 2020-12-30 15:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 91b2c7e7b5dfac30b3ccbe18dcfad897 SHA-1: 65b57bf96fce08bf93d0e90233416dc3e1bbd7b2 SHA-256: b087389b8299d0b1a998ba2034b74262746f2f0d7dd50777fa77356f5ad6a87b
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm designed to distribute malware or phishing content. One of the embedded URLs, 'https://traffnew.ru/123?utm_term=poweramp+full+version+apk+2019', appears to be a lure for pirated software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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/123?utm_term=poweramp+full+version+apk+2019 PDF link annotation
    • https://cdn.sqhk.co/lixozimiz/bvigiba/kowusasokumurumi.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/pujogabedisuna.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/iahbhcj/35704458522.pdfIn PDF document text
    • https://ronabamipiboti.weebly.com/uploads/1/3/4/5/134598089/motolinajofizoj.pdfIn PDF document text
    • https://nibobesexetew.weebly.com/uploads/1/3/4/2/134266191/wafezizoxox.pdfIn PDF document text
    • https://jisasulozif.weebly.com/uploads/1/3/4/3/134371627/8479443.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/bubeto/anthony_bourdain_books_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ebb7c1-75ff-44e3-8a8b-4d882f752203/aliexpress_lace_front_wigs_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7ab16c-4e51-4a23-9c12-66ce1a241552/79160578748.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5a8fd6-1be0-4360-826f-6b378f657df9/tabalun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03da1f0-deb8-4e63-8b94-153ff06ccba7/bulalukoxilotela.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/63092388415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8debf8e6-53ac-48bf-9379-e142d67ca222/jivuruwukizawinavuzizo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5106d44-ce34-4f0e-9d16-fa662a31d738/bazemego.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 5748 bytes
SHA-256: 104474f06195858a7cf6187274a347f35a82230cd568635f0c2a600b48046cca
font_01_sfnt_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 10548 bytes
SHA-256: 22df0a9db45be62853212b038ff9f46f6e9eb32c30c6f9eab2673b789a60c33e

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