Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bbad14a024a125…

MALICIOUS

PDF

76.0 KB Created: 2021-01-09 23:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9a5e5d0e019d64cde65bbc17d9402a09 SHA-1: 6f55c77515a121149c8b1d00710d0b4ac72c2a4f SHA-256: b5bbad14a024a1250b0bd8258385955a7cb14d29f6121d7de0e5745dffbdf1c8
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded URLs, with one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download further payloads. The document body, though garbled, suggests a lure related to 'Abordagem quanti- qualitativa pdf'. No scripts were extracted, but the presence of malicious links is a high-confidence indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/aws?utm_term=abordagem+quanti-+qualitativa+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4401540/normal_5ff9eb770bd98.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefegevo/bhbigji/era_of_celestials_best_overlord_skills.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473030/normal_5fdf755c7a392.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386606/normal_5fe6012f2dddd.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/nuzefixajinolika.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/hdih4Kk/483560028.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/viwoxuz/41598348179.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/tedokugidiv.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/2001_honda_shadow_600_weight.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/backlinking_seo.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/33588639910.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/81716646744.pdfIn PDF document text
    • https://doi.org/10.14393/REVEDFIL.issn.0102-6801.v31n61a2017-pIn 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_off0000ea1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1D 5532 bytes
SHA-256: 302d3498bf3523cdf501fdc94213a779f9bfb6f99201bdcfcffa10f096ba9f73
font_01_sfnt_off0000fcde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 12544 bytes
SHA-256: 8a0e0bb1610a48cfe4df2653587ee0ea20f4ddc294ac34beb9ff34a4157bf124

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