Malicious PDF — malware analysis report

Static analysis result for SHA-256 62004b591a656c95…

MALICIOUS

PDF

60.9 KB Created: 2020-11-25 19:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 63de95098450c3a3e4d0ffc13450d7a9 SHA-1: b2a074ac077f2f739780da31049191606c69c92d SHA-256: 62004b591a656c95f00233a1270a0d01a101db2ae57082ead995c30ef7de1d25
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or SEO spam campaign. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to drive traffic to malicious or spam content. The document body, though partially corrupted, references "Pearson interactive science workbook answers", a common lure for educational phishing. No scripts were extracted, but the PDF structure itself facilitates the redirection to numerous external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafficel.ru/123?utm_term=pearson+interactive+science+workbook+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382003/normal_5f8bb4d453d5a.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/wodowijubovu.pdfIn PDF document text
    • https://fugubujezowegi.weebly.com/uploads/1/3/4/5/134502495/kuxaj-kogivevax-vewilibir.pdfIn PDF document text
    • https://fobewesepujub.weebly.com/uploads/1/3/2/3/132303403/d448c6d5e780be0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f893ea33f2ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f9be4b697a9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fb0152a39af4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_5f91c568bf1ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f89637a2c996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378845/normal_5f907e8a3874d.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/lapazudogeruterev.pdfIn PDF document text
    • https://vonorakukipi.weebly.com/uploads/1/3/4/7/134721252/defulusinixasutexow.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/5850595.pdfIn PDF document text
    • https://talupujepanuzan.weebly.com/uploads/1/3/4/5/134595677/tivasugexisogige.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41163a9f-b7c9-4995-99c0-8961dd5b3db7/ellos_son_de_marte_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/985b2dec-6e5e-4a7b-a84f-7685f412c045/sutazesaberadonoraxixuwez.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_off0000b2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AB 5120 bytes
SHA-256: 56692ce7442ec7298495969596ac56967a0b2be6c748b833da92b052d9caa2cd
font_01_sfnt_off0000c43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC43E 10096 bytes
SHA-256: 5f491c055c9b5e7abb704b69f708eb76b92ed20984728330382215a77d7ffdb6

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