Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7a47e8b86ae8fe…

MALICIOUS

PDF

69.4 KB Created: 2020-12-15 10:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 609f1c051d37dfc7b66d53f1226ab68a SHA-1: 0ac085b49d1ee79b8d06a17ad1813d94d6033b3c SHA-256: 1f7a47e8b86ae8fe88a49d59b10bf9d1a907b796c9547f8744900826bc48141a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The embedded URLs and the heuristic firings suggest the document is designed to redirect users to potentially harmful external sites, possibly for phishing or malware distribution. The ClamAV detection further supports its classification as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=keep+your+enemies+close PDF link annotation
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/f5470f.pdfIn PDF document text
    • https://tuluseso.weebly.com/uploads/1/3/4/7/134718642/b764b17e3a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471704/normal_5fca384014929.pdfIn PDF document text
    • https://bufetokarad.weebly.com/uploads/1/3/4/0/134096279/masir-zodotol-velamorit-dededaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392463/normal_5fb91899db8e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486748/normal_5fa996216236b.pdfIn PDF document text
    • https://losepubi.weebly.com/uploads/1/3/4/5/134502138/lodipe.pdfIn PDF document text
    • https://rokumewa.weebly.com/uploads/1/3/4/5/134529377/7689666.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/najulolevow.pdfIn PDF document text
    • https://mopepeserowote.weebly.com/uploads/1/3/4/6/134621402/livafonizewu_butimeninatino.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/banula/super_antivirus_cleaner_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc28758084698658e68a1d4/t/5fd20a09b0f0f842d7ac3ca8/1607600649762/gunokowukuxilufiget.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2c204c30a162e0c5e803a/t/5fc4b3a93c02f22b9da1766e/1606726569935/nowajijepajagamakabog.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/kuratitalawaban.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/environment_and_ecology_notes_for_upsc.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/information_about_provident_fund.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_off0000d3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FA 4940 bytes
SHA-256: 02933ec0477ba3bdcffad1f43d6a5da087ad01fbe221193f59e1fef113e71815
font_01_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10508 bytes
SHA-256: 76fa7c0e4733bbed7dcc46d2d995d9fd7f0b9ee1e438512f05eb348fc80a616a

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