Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7979d06e2fcb45…

MALICIOUS

PDF

89.1 KB Created: 2021-06-25 16:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bdd8fe5e9d8fd777d250d1ad3b760bf SHA-1: ef3d8048c2e15c7d028c90567adfebb662f7f286 SHA-256: 6d7979d06e2fcb450250ff660d82d7370e49a7e4ca261d169ff1f690e43ff1b7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on compromised websites, suggesting a phishing or social engineering campaign. The document body is heavily obfuscated, preventing a detailed analysis of its specific content, but the heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates a fraudulent intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/rh9kjqa8d6pafka76u5jeok6c2/xalelenukononilirisa.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/l34s0ivo2qk50veis52e99se37/rorozirenusanatutigelod.pdf
    • https://alternativecarrepair.com/userfiles/file/lilezomuzuvufeba.pdf
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/5ufc22regn9u1i05g2ti81i14n/16825442106.pdf
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/672fe80fd6bba5af5a2038579f1812ad/81234536279.pdf
    • http://conblocmanado.com/pics/file/133548221.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acb38cc9a86---xujonegodak.pdf
    • http://ntrc.biz/clients/f/f0/f0759d16aca5b3dfc9163ee994587b7f/File/mefuwa.pdf
    • http://kirilmazbardak.com/userfiles/file/92372392060.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1660db4e70---75337230946.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b520aa97---finuwojew.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/lnai2klhu54aalflq26e33kkko/30911186154.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4fa6103a1---fofakorerenegivu.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb779bb3d9---totazomudojavobopuralo.pdf
    • http://vickerycarpet.com/uploads/images//files/45755012654.pdf
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/209ec32bc0360de395db61514cdb6adf/xaxavijinunusinagu.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087faca7d49b---wabumobijulelezozakawet.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=crack+for+photoshop+cs5+free+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_off0000f825.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 16792 bytes
font_01_sfnt_off0001103c.bin
fa85741bf53593edc974e941d08413b060e7a02902f0a2972c473dfc56da0245
pdf-font-stream PDF embedded font (sfnt) at offset 0x1103C 10968 bytes
font_02_sfnt_off000129d3.bin
8e8d0444df0dcbd9e51d03c904c8536019fa7ccc7b087ef48c749128cb36f144
pdf-font-stream PDF embedded font (sfnt) at offset 0x129D3 17496 bytes