Malicious PDF — malware analysis report

Static analysis result for SHA-256 593e185e8cdacae5…

MALICIOUS

PDF

86.4 KB Created: 2021-06-25 20:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 552f036504f8d0e169a3bb3356ac9d9e SHA-1: eeef5839a9524bf6c5c49d36df08e58bd7e9ac3e SHA-256: 593e185e8cdacae5d3ff9787eda9cfc318efbca0bea0e11142ec982ecdcd2a83
196 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it is an advance-fee scam lure. It contains numerous links to external PDFs hosted on compromised websites, suggesting it is part of a phishing campaign designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84ff96ef4---juladujiduvakoniloguvov.pdf
    • http://interiorconsignments.com/media/file/57654515298.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/559f0a8185f06a0003d2743eae133a13/rijisatefi.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160727a6772600---wezotabofig.pdf
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/15760380957.pdf
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/32faf2800c9583f4b1f23e528d398ab8/6103106597.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cae32472cd1---548343818.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084229f1c835---58066878734.pdf
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/60518140676.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe0f3a9a3b---67039634635.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/0ni26jq4udnjqnp1se066gmev2/81330815784.pdf
    • http://africanhairbraidingsalon.com/userfiles/file/60315857347.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3189a64e9---46479110966.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075e2bbcb9ef---kimukemujolobidofavofu.pdf
    • http://ride.hu/images/uploads/files/33090474772.pdf
    • http://angelcabrera.com/FCKfiles/file/71264823422.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/spg7lur7f5embul4ahvbp3bbu0/94367881194.pdf
    • http://jfac.kr/ckfinder/userfiles/files/55512063471.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e7ac1294b3a3ba85911ed16f052ce530/5337825043.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/9a074f91849a72071f96c4253e7360f2/43484569755.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a781d7b52ff0fb525f67a0f74c26a96d/dujejatal.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/nlicq4ttm3ph64ncnicc8i4r94/53323868006.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a422ca0464a---75831535452.pdf
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/def877ddd43be4145fe50d015a8b28c8/12275396010.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd5a3b06c2---kafedomubulefevij.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=tom+and+jerry+willy+wonka+and+the+chocolate+factory+in+tamil+download
    • 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://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_off0000ed15.bin
907b3007954c19757420bb482ac1afe3c6a65a91308a2baa19b4a01bc7198945
pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 10960 bytes
font_01_sfnt_off0001064e.bin
ce7791346395e4acfa442acb3aef8a64580ffcd8dd462ce6ddaba45485d2dd21
pdf-font-stream PDF embedded font (sfnt) at offset 0x1064E 17200 bytes
font_02_sfnt_off0001339d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1339D 16792 bytes