Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06212333c29d72f…

MALICIOUS

PDF

81.3 KB Created: 2021-03-26 07:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e03d786335a653a2ff6154766a3f4a37 SHA-1: ef120a23d21369ace2556e194132145f736fc377 SHA-256: c06212333c29d72fca9ca0a45febd09793aed9706c8e1cf2a65b24972ab307fd
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or SEO spam campaign, evidenced by a large number of external links, including one pointing to a URL designed to appear as a legitimate resource for 'Android application development pdf o reilly'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or further stages of an attack. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/award?keyword=android+application+development+pdf+o+reilly
    • https://cdn.sqhk.co/miwavilusaji/gyLgeie/xtreme_vr_maze_horror_runaway.pdf
    • https://static.s123-cdn-static.com/uploads/4413713/normal_5ffe8760e3b59.pdf
    • https://cdn.sqhk.co/kugorazig/Whcnwia/tujodexiruloto.pdf
    • https://cdn.sqhk.co/bowewulaxam/fjdjiRO/50544467129.pdf
    • https://cdn-cms.f-static.net/uploads/4456165/normal_60377f7841978.pdf
    • https://cdn.sqhk.co/bikugipozamu/lw6hcrk/72164757569.pdf
    • https://cdn.sqhk.co/zisuzunon/gepidig/dilixisipugida.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/titugome/setakatuwabokokimaxip.pdf
    • https://43a98339-0465-49d0-a416-8cef4780896f.filesusr.com/ugd/89258f_bfb5601d1645421b84f986d2223f0c96.pdf?index=true
    • https://s3.amazonaws.com/wupixufekijax/93167575036.pdf
    • https://ad5375d1-0dc8-447d-a54b-f1659eeba1ba.filesusr.com/ugd/a4ba79_c7b70b5c168e4463a168665c8c610d62.pdf?index=true
    • https://67258aaf-84c5-4a88-bfd2-1aa7ddb6c27a.filesusr.com/ugd/850f07_056fd966763c477ea9a713d25ad5ddd1.pdf?index=true
    • https://s3.amazonaws.com/webipejonavuv/buxidapu.pdf
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_6d2c700241ef4ce6a8202cd6f863f98b.pdf?index=true
    • https://c7fb3737-a2fb-4e06-b71d-f78b648bb0a4.filesusr.com/ugd/a9248e_9fb350902ee94d2eae4edf1a0dc03b2d.pdf?index=true
    • https://s3.amazonaws.com/xakajoziwibi/62303864144.pdf
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_a75987b0b11348d7bfb417b26584ba1f.pdf?index=true
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_95cece7e07de429fbdf32e8c2c64e878.pdf?index=true
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_68e72124b506450584ad8cd94de38847.pdf?index=true
    • https://s3.amazonaws.com/bodajaku/plasmolysis_elodea_lab_report.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f27c.bin
14ce37d185ea07a12dba1ed6e3e9de186110188ec4599ccc1d73cb98b7dcab9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 5064 bytes
font_01_sfnt_off000103a3.bin
388633362dd61c082e7bef23266a1f9f338ed5e4cd3be43143dc20bce2531ab2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103A3 11288 bytes
font_02_sfnt_off000129a3.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129A3 4324 bytes

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