Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca66c69ec82cac4…

MALICIOUS

PDF

81.0 KB Created: 2021-03-08 11:12:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 771190537074101dd03955e809062ca8 SHA-1: 7594afbc56a571f50c8f30d4cd9b4d8be29c562e SHA-256: 1ca66c69ec82cac4c48fd88804f3b3856ee841950ae5c6059ca14da49de20077
164 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to 'maypoin.ru', which is flagged as suspicious. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm used for SEO manipulation or to distribute malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=weight+lifting+schedule+template
    • https://xumogawas.weebly.com/uploads/1/3/5/3/135341739/898999edbd.pdf
    • https://somirurawepaf.weebly.com/uploads/1/3/1/3/131381963/9621558.pdf
    • https://cdn.sqhk.co/numavagoko/vCgjaEk/electrical_power_calculation_problems.pdf
    • https://cdn.sqhk.co/sifomujotaxa/d8y5LcS/jafazabopufawerubexir.pdf
    • https://static.s123-cdn-static.com/uploads/4425491/normal_5fe07b71ae17c.pdf
    • https://static.s123-cdn-static.com/uploads/4450638/normal_5fdd8040a183c.pdf
    • https://cdn-cms.f-static.net/uploads/4450147/normal_601d2cdf14d44.pdf
    • https://cdn.sqhk.co/tolononof/6Bggjhj/innova_business_management.pdf
    • https://cdn.sqhk.co/xolanikipiz/gcbglAJ/server_rack_accessories_list.pdf
    • https://boxuvudadutubip.weebly.com/uploads/1/3/2/6/132695546/1992194.pdf
    • https://cdn.sqhk.co/tibakekavero/ibghQe6/private_wifi_address_netgear.pdf
    • https://cdn.sqhk.co/noviraxat/hahgVij/music_equalizer_amplifier_volume_bass_booster.pdf
    • https://cdn.sqhk.co/gikokimofegi/fcicDgi/brightest_rechargeable_flashlights_for_sale.pdf
    • https://jonomivebotuw.weebly.com/uploads/1/3/4/6/134683751/nojujugejulimi-giwovube-kapikaj.pdf
    • https://cdn.sqhk.co/benanejufa/Kjdjfgf/smash_2019_model.pdf
    • https://cdn-cms.f-static.net/uploads/4373264/normal_6026d0c81bd8c.pdf
    • https://cdn-cms.f-static.net/uploads/4486042/normal_5fdc01cc73b98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a772cda4-f4ad-4cd3-8a99-22400d629a2f/what_is_bells_palsy_in_hindi.pdf
    • https://uploads.strikinglycdn.com/files/2a9f049e-9c10-432f-bc85-645419e7eb19/vosibisepifurijipanuxez.pdf
    • https://uploads.strikinglycdn.com/files/a1dc517b-3162-402c-941c-c36bbea0b651/vepiba.pdf
    • https://s3.amazonaws.com/xovekolamoxe/waterproof_mattress_pad_vs_sheet_protector.pdf
    • https://uploads.strikinglycdn.com/files/fe319a67-7fe8-4df7-832d-7bd0f0fc3f23/can_you_put_vicks_in_your_oil_diffuser.pdf
    • https://s3.amazonaws.com/gekixadonuru/37562732314.pdf
    • https://s3.amazonaws.com/dukavunivifa/sonilokovikomigoror.pdf
    • https://s3.amazonaws.com/ganubifirigevi/18204342642.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead4.bin
954bbfa7e03e9066704a4a78f0c977c50f30dec693c91e656eb12a824977c5b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD4 5488 bytes
font_01_sfnt_off0000fd6d.bin
306008a70edfe83110067ee43777f689c579f1de8d7c44b5363480c7ae0dbb1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6D 9000 bytes
font_02_sfnt_off00010f8a.bin
d32d48fff53cc34b0975836cabe1d9cff3b15425a5206a2def7203033c6c8cdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F8A 10704 bytes

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