Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d44659968dfc777…

MALICIOUS

PDF

153.2 KB Created: 2021-04-02 14:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d80597ec32d69cfa637396e6ffea4c38 SHA-1: 80bcb4a1dc7fd7f419df4c0c0477cd005e79cf35 SHA-256: 2d44659968dfc777c72ba8146d8a37df6a2fa6cf9d1abe0ce1dd29d2cac3d9a4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://ponafet.ru/wix?keyword=kenning+word+for+music PDF link annotation
    • https://cdn.sqhk.co/zanotunuzi/ggcagje/80391549130.pdfIn PDF document text
    • https://zukixuvaxetili.weebly.com/uploads/1/3/5/9/135988851/a77cb910f2a6d9.pdfIn PDF document text
    • https://rimofemosi.weebly.com/uploads/1/3/4/3/134351632/85020.pdfIn PDF document text
    • http://vijakaru.iblogger.org/antologia_de_cuentos_cortos.pdfIn PDF document text
    • https://kokubexajaluk.weebly.com/uploads/1/3/2/6/132681668/8003469.pdfIn PDF document text
    • https://lowutifita.weebly.com/uploads/1/3/4/3/134352456/096906507a14fcf.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://togezajotutev.weebly.com/uploads/1/3/0/8/130874352/2746199.pdfIn PDF document text
    • https://lonofajizol.weebly.com/uploads/1/3/5/3/135389348/venifef_wuvukeb_simiv.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/jiWibgh/dictator_ancient_rome_definition.pdfIn PDF document text
    • https://kutufesivom.weebly.com/uploads/1/3/4/6/134632784/dajenixo.pdfIn PDF document text
    • https://sikowegapewabi.weebly.com/uploads/1/3/5/9/135975971/7848221b78431b.pdfIn PDF document text
    • http://www.opentle.orgIn 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
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_f3d40a52ac7a4e3b95864af81d83e960.pdf?index=trueIn PDF document text
    • http://zisuvedo.rf.gd/learn_python_the_hard_way_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc86a93-3d39-4a07-8814-f1bcc1a44848/daxigesoxaxiwigile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d211ea6-c29a-405f-a332-61e9fe551ea8/british_army_jungle_survival_knife.pdfIn PDF document text
    • http://wedemato.rf.gd/accounting_for_decision_making_textbook.pdfIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_87abf3a2980c42a2970b65151598109e.pdf?index=trueIn PDF document text
    • http://naxokagad.epizy.com/zowulozuzisofe.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0001f285.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F285 17748 bytes
SHA-256: 1199c7acb88359fd76f528484ded8d5e6e12002c66cc866ec0f7fdb972b9e75b
font_00_sfnt_off0001e1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1B9 4964 bytes
SHA-256: 9be5892698aad90e3a2dc1fee275ea939d21a9be59c29cf01a825f57faf608ae
font_02_sfnt_off0002221b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2221B 11584 bytes
SHA-256: ba3cbf54d0b90a7ec166f970d213277c8f833e6ef7e7f6bfdc77473d9f14168f
font_03_sfnt_off0002492a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2492A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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