Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2668860df96f24c…

MALICIOUS

PDF

76.5 KB Created: 2021-03-05 22:38:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 173f0a05b8805bb9ab50e75afe4141ca SHA-1: 4d40ae2822d6e1c6b2af20a137af89f059fdef11 SHA-256: c2668860df96f24cb5c6bb60d1610eeb57a03bf81012ff6e3fc543e451aa100e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one pointing to a suspicious URL that is likely part of a phishing or malware distribution campaign. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to create a link farm or distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://pelibifir.ru/wix?keyword=cuerpo+y+alma+barcelona PDF link annotation
    • https://dexixafavako.weebly.com/uploads/1/3/4/3/134348567/gudumuzoxaluz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384307/normal_6005bac138ff4.pdfIn PDF document text
    • http://dazefoxezizu.iblogger.org/canon_mg3650_setup_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5fcec00230bce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501965/normal_5fcdf38a1084c.pdfIn PDF document text
    • https://zefijevizo.weebly.com/uploads/1/3/2/3/132302816/1873634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383698/normal_602b33df1527a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446789/normal_6038fcd8d41b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410730/normal_5fef395299c22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fda30ce31af4.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/kifutizijebuj/lynbrook_schools_report_card.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/powerpoint_for_mac_templates_free.pdfIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_d08da096a4d4425f9bff20c6640951e4.pdf?index=trueIn PDF document text
    • https://1e1f235d-56dd-4976-b20d-d38e3fe7b172.filesusr.com/ugd/210b45_7523fe0a048740419405875d0dd54d03.pdf?index=trueIn PDF document text
    • http://loxototo.epizy.com/bufat.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_db48f9efcca8400a8f03b2ced0c7f418.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/kadarupegapanowodijo.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_5a5dd4df9f9c4a51871dea29bab58b71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuzamada/6635932896.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/farusugibitotufexaf.pdfIn PDF document text
    • https://97d49ff2-d914-4ae4-8ac8-5e5cf5f77cad.filesusr.com/ugd/6350c7_03b0bb2e1d784ce4a55240fd209d2ddd.pdf?index=trueIn 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_off0000d777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD777 5048 bytes
SHA-256: d6e298818cd7f39efbb7b0d72c0ae84e9a75ff656199aad160aedc9cc3646ea4
font_01_sfnt_off0000e88d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88D 11500 bytes
SHA-256: 14d463b9dabfd72a67c5616d6a6738e08dcebef400b584be5c9108111bf95328
font_02_sfnt_off00010e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E49 16036 bytes
SHA-256: bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17

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