Malicious PDF — malware analysis report

Static analysis result for SHA-256 f580c66f4e547aae…

MALICIOUS

PDF

81.5 KB Created: 2021-04-05 10:43:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 42cc926d7cbadd80890dcda70daa7a2e SHA-1: f30aa00b169027474e7ce7d3834c8cea40a45ac7 SHA-256: f580c66f4e547aaecc5da2115f6a51b0e30f360220f57e9849a6c0ad2ee055a8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://jacksth.ru/award?keyword=sejarah+bani+umayyah+lengkap+pdf PDF link annotation
    • http://megazoni.iblogger.org/mewasefiwukogigabegagipoj.pdfIn PDF document text
    • http://xibawolafubiz.getenjoyment.net/audacity_english_in_hindi.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/fekoji.pdfIn PDF document text
    • https://pegalidaxib.weebly.com/uploads/1/3/4/6/134632492/508617.pdfIn PDF document text
    • http://vegekezivujid.22web.org/28303940419.pdfIn PDF document text
    • http://vigastlens.xyz/the_millers_tale_modern_englisho3jfq.pdfIn PDF document text
    • http://ctyr.ru/dulce_et_decorum_est_poempx0ko.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/josinenoxisemaxu.pdfIn PDF document text
    • http://teragoronowaki.iblogger.org/23742601162.pdfIn PDF document text
    • https://melekutiruj.weebly.com/uploads/1/3/2/7/132740408/wuzegorubak-lerubaneputixit-roxuzasab-xazanumabun.pdfIn PDF document text
    • http://vigastlens.xyz/the_brothers_karamazov_movie_free8hqvg.pdfIn PDF document text
    • http://sujabupinoda.scienceontheweb.net/hoover_windtunnel_2_pet_rewind_bagless_vacuum_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gozuketitara.onlinewebshop.net/91331329975.pdfIn PDF document text
    • http://zekumom.epizy.com/56567782064.pdfIn PDF document text
    • http://bilunijo.epizy.com/sezofulupu.pdfIn PDF document text
    • https://7f2467c6-0d80-4e38-8df7-27624e0b9669.filesusr.com/ugd/e19533_e17b430c98594e918cf3f0099438382a.pdf?index=trueIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_6373757467674d5d9674658c18218de3.pdf?index=trueIn PDF document text
    • http://vedezanopade.epizy.com/buxtehude_magnificat.pdfIn PDF document text
    • http://vokesakogo.onlinewebshop.net/62454157671.pdfIn PDF document text
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_22d25eaa2a1d499b958da98db2a42338.pdf?index=trueIn PDF document text
    • http://vetanafajodomek.epizy.com/punumepimelif.pdfIn PDF document text
    • https://5e54824a-8208-41b0-8aeb-7c017e8cfb46.filesusr.com/ugd/f64db8_0edeea003ac24cd296d7a6355ede088f.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 5760 bytes
SHA-256: 8492913d4a3e1b7eea9875c92e4f5a3d9d3c1f7f723e9c0ac95d9e5bc7418a9b
font_01_sfnt_off00011437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11437 10684 bytes
SHA-256: 1110442735dbbd00cae94fe555fe33621f82a2f6eeac2518cd603f666cf0fa43

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