Malicious PDF — malware analysis report

Static analysis result for SHA-256 6283d9018e820a23…

MALICIOUS

PDF

50.1 KB Created: 2020-11-01 19:06:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fdf0475fbdbe427b8f3484d9bb5324b3 SHA-1: 2ddb3bf8f4deef10588ad8ce25d33fcacfe3fc9b SHA-256: 6283d9018e820a232e9d52dd982d9a5670ebe7c5c55cf5c83f629966e093ac4f
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded link that points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user to a harmful site. No scripts were extracted, but the presence of a malicious link is sufficient evidence of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://ggtraff.ru/strik?keyword=unblocked+games+barbie+lady+gaga In PDF document text
    • https://jakemujilofadam.weebly.com/uploads/1/3/1/3/131380171/28988affc123d.pdfIn PDF document text
    • https://tolixolosunep.weebly.com/uploads/1/3/4/4/134403343/b1519df79f77c6.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/xopevu_vilugarokobijos_fimorekon.pdfIn PDF document text
    • https://tedumuwoke.weebly.com/uploads/1/3/1/3/131397970/1803763.pdfIn PDF document text
    • https://dotigima.weebly.com/uploads/1/3/4/4/134404546/f97462.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/6613190.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/b4b6ecd73b.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/piwanisaj/25298407596.pdfIn PDF document text
    • https://s3.amazonaws.com/dedinavesute/lab_equipment_and_function.pdfIn PDF document text
    • https://s3.amazonaws.com/zokokamu/fogogajukuku.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/51719963270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5517b8ac-7fb0-4850-b9df-a33a5affec34/stairway_to_hell_location.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/bokowunafineb.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/sibebewerufoxobapezilajer.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/simuzifobinumejak.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D17 5556 bytes
SHA-256: 6b10a22aabad75df6ea3a0752e604cc4651159fee4b67a487455b6e951d20bad
font_01_sfnt_off00007fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FEC 11104 bytes
SHA-256: 572b050466d77c55f20317485badb2883cd77d3c1567ef59f0a1d16d285404f3
font_02_sfnt_off0000a60b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA60B 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3

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