Malicious PDF — malware analysis report

Static analysis result for SHA-256 6192cb59d24de152…

MALICIOUS

PDF

75.3 KB Created: 2021-04-05 04:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 246ede2aa348bc888689992acf636212 SHA-1: 438eeaf9eee7d428e449c5f03b17b6f53b4ee86d SHA-256: 6192cb59d24de152a977a4606c5b94719878240bd84411f0cfc95124d6c6e202
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting and potentially malicious domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain keywords related to medical conditions, likely used as a lure to entice users to click on the embedded links.

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 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://seumenha.ru/award?keyword=spondylosis+spondylolysis+spondylolisthesis+pdf PDF link annotation
    • http://demask.space/uglys_electrical_referencetd04v.pdfIn PDF document text
    • http://navalny.design/kidopatidawuwemir64dd.pdfIn PDF document text
    • http://italywow.info/topodabogelobakesm5rwt.pdfIn PDF document text
    • http://azorocheat5.xyz/report_dead_seal_maine9zbgz.pdfIn PDF document text
    • http://septiki-rf.website/duck_hunting_season_2020_illinoisd2tw1.pdfIn PDF document text
    • http://dithetsen.xyz/52399009937dxm4z.pdfIn PDF document text
    • http://b0xberry.online/dilomomupp5apb.pdfIn PDF document text
    • http://glawerry.online/4538268689897ff2.pdfIn PDF document text
    • http://rm-swis-mine.com/how_to_use_old_presto_pressure_cookerv8hig.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/b3838adb-ecb8-4ff4-8b64-6a9fb757c166/72930131750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57634d7-2682-4e09-b2df-eabc33939f84/1576991137.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/54706112805.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01c68165-cbc5-47f7-b928-ad9ed5ed955e/fuloxawodegelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0725fb6-fe08-4784-ada9-6928d29b82d7/sakakamina.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/latidukomuxobuzagejeruwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc93921-652d-4b44-98a5-2ec4a883f56d/50898972174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9bf7e6-b592-4732-b5ac-4fde4ca66869/zesururabekol.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/6509434695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d9a0be1-6cd7-460c-87c8-f9cf4540bb93/64928687311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d12c2c-ffde-49ae-9fbd-f3b021ac8d02/48805860962.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/epson_xp-620_ink_refill.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/47559466164.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_off0000e950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE950 5028 bytes
SHA-256: f102fcc41d638b90e75251b870fe809ec526186b7158a32cd5657e7639b255f6
font_01_sfnt_off0000fa78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA78 10892 bytes
SHA-256: 965d2c56a1c6384f6b1bc8ce901cb5cce200ad9c5c6a6128ea122b62ad14190f

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