Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e1f64fa190b62c…

MALICIOUS

PDF

73.8 KB Created: 2021-01-30 19:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 481a46cef47f63b9c0e79b475c287332 SHA-1: 52cd2185e68b0665565e35ea5bb038e4a048c7ad SHA-256: 56e1f64fa190b62cbf9821c53494ab4c426dabf4a526481ca342008e7b282308
126 Risk Score

Malware Insights

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

The PDF document is flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one that appears to be a lure for downloading a free PDF of a book, suggesting a phishing or malware distribution attempt. The presence of multiple disposable hosts and link farm characteristics further supports this assessment.

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 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://maypoin.ru/123?utm_term=eating+animals+jonathan+safran+foer+free+pdf PDF link annotation
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/gowubava-piwizomukuvit-zorimubewifas.pdfIn PDF document text
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/zukato.pdfIn PDF document text
    • http://air-calm2.club/pabixupcgv0.pdfIn PDF document text
    • https://lolovegadagofi.weebly.com/uploads/1/3/1/6/131636941/5ab149.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/ghGhjaj/hero_of_archery_hack_mod_download.pdfIn PDF document text
    • https://fogufufizanalu.weebly.com/uploads/1/3/0/8/130813948/b224e5e510.pdfIn PDF document text
    • https://rizibibaruf.weebly.com/uploads/1/3/5/3/135383358/fezagodumosa.pdfIn PDF document text
    • https://cdn.sqhk.co/junizafuzep/4tNXzgj/niforotikolifixe.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/vulezamurixevelijuwijow.pdfIn PDF document text
    • https://wesoxuzepa.weebly.com/uploads/1/3/4/3/134372623/wifiso.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/k9ij2ge/verawizazov.pdfIn PDF document text
    • https://sonikimejikelo.weebly.com/uploads/1/3/2/6/132681145/157c569cc407.pdfIn PDF document text
    • http://tuxosuzarug.iblogger.org/88477716898.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vibejasejejake.epizy.com/43010323339.pdfIn PDF document text
    • http://gunubepixel.epizy.com/37795911043.pdfIn PDF document text
    • http://wotolag.epizy.com/jogapejufaf.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_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 5488 bytes
SHA-256: 2aeab0d2b0ce4a1c219aa04afcdc15e1ee4a24e00aa41b53b8cf4c43c677a21f
font_01_sfnt_off0000f501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF501 10876 bytes
SHA-256: 5bdd0d4d3607bbc5b84266c3caee41f58e084c935dd63155a99aac00717ae3f2

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