Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa569c8d038d87e6…

MALICIOUS

PDF

75.8 KB Created: 2021-04-29 11:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2c9b31321f53d7908d6d1eba3f895355 SHA-1: 948b5a86e0ce357713bbbbf04efc8f72157da7f4 SHA-256: aa569c8d038d87e66963bb000917eb4e69131b0726b437eeba90aeb5156918e2
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://jacksth.ru/strik?utm_term=bose+solo+remote+control+codes PDF link annotation
    • https://safalijig.weebly.com/uploads/1/3/1/0/131070993/7bacc3245f8c16.pdfIn PDF document text
    • https://wawedubogefolik.weebly.com/uploads/1/3/5/3/135391715/980490.pdfIn PDF document text
    • https://wegebumerovoni.weebly.com/uploads/1/3/5/3/135387929/wakojapiza.pdfIn PDF document text
    • https://webuwoterin.weebly.com/uploads/1/3/4/5/134589655/13a526414da8.pdfIn PDF document text
    • https://ranatugirebulox.weebly.com/uploads/1/3/4/0/134017659/474b2.pdfIn PDF document text
    • https://vegipojefatelon.weebly.com/uploads/1/3/4/8/134876486/3424975.pdfIn PDF document text
    • https://fiwugepupuladav.weebly.com/uploads/1/3/4/7/134740110/rapukewidujosaze.pdfIn PDF document text
    • http://fufibubesex.iblogger.org/12333780118.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/pegozegi/urdu_arabic_calligraphy_software_free.pdfIn PDF document text
    • http://girigiroret.rf.gd/gumeloneripopem.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/77763266050.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/81885867693.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_7bc75db0b7044e9bb393ca8c1fd755d3.pdf?index=trueIn PDF document text
    • https://1f571a09-6495-4108-bd1a-9715deae29b5.filesusr.com/ugd/b0bf26_21d3c0622869410d95e9b458da5042db.pdf?index=trueIn PDF document text
    • https://f18b8dc1-3ce9-44bd-8712-01435d039869.filesusr.com/ugd/b97cba_af08c3e59fe24f92bdb6468d3cb22a0e.pdf?index=trueIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_73be298b268a4f6089e859d4a1193fdf.pdf?index=trueIn PDF document text
    • http://bevonox.epizy.com/46227163717.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/97980277551.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_off0000edcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCC 4924 bytes
SHA-256: 16ccbd58de57ee566377a1f6c30651a255a7dffca1213f941b45f8b55012fcd7
font_01_sfnt_off0000fe77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE77 10472 bytes
SHA-256: 85eaa665aee81953871cefed2198d903fb87cbecb9bd3139b3e1daed2afec3ff

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