Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad2b69cf13329280…

MALICIOUS

PDF

73.2 KB Created: 2021-02-10 09:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 04bdae2e3264adf95568f366b5bd1184 SHA-1: 67a402747c0c2e36e688e6a0f572f32a4a1bf48a SHA-256: ad2b69cf133292803252b2fa82c053c39055af96643c3c7758822bd207c2398e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or SEO link farm attack. It contains numerous embedded URLs pointing to external PDF files, suggesting an attempt to manipulate search engine results or redirect users to malicious content. No scripts were extracted, but the PDF structure itself facilitates the attack.

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://seumenha.ru/aws?utm_term=escape+room+mystery+word+level+70+answers PDF link annotation
    • https://cdn.sqhk.co/vojofarakiva/iXhj7aQ/jerizunovokeduzibave.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/C2SzgcQ/34820104357.pdfIn PDF document text
    • https://rurawovupotoli.weebly.com/uploads/1/3/4/0/134017211/juzalawixafit-fexipotis-vizozot.pdfIn PDF document text
    • https://cdn.sqhk.co/peluxisomex/higsV2R/panowitelanezidewebijor.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/d1uvbM1/sky_force_3_4_grey_fog_release_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_60166f0c1720c.pdfIn PDF document text
    • https://cdn.sqhk.co/vitozogog/gjaLFic/hmrc_vat_number_check.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370059/normal_5ffe1a9ee818b.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/8idYEib/mixigubodivodegekitanud.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417653/normal_5ffb2f3621efb.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/qm8gg4J/xivuwuzulufif.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/cjl1ham/weather_live_forecast_clock_widget_morecast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366625/normal_5fe1548acbe0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5fe52bd8cb887.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_601f03790d79f.pdfIn PDF document text
    • https://batebabegusuk.weebly.com/uploads/1/3/1/4/131437625/mawuripixe.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/vghjhvS/27084464956.pdfIn PDF document text
    • http://korecos.ru/apprendre__parler_couramment_le_franaiszxe4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD464 5392 bytes
SHA-256: cb984025f2146013ac1db7b8e89de74f75a7ea7ecf08962cb0706886c7c3cc58
font_01_sfnt_off0000e6c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 10372 bytes
SHA-256: a4404160d7fb0f734fd4387bd10928a1795c9047a9d036db9cedad876f945335
font_02_sfnt_off00010980.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10980 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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