Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5a0c1e9d1fd054…

MALICIOUS

PDF

83.8 KB Created: 2021-07-25 14:05:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e2b1fd2032cba31355d8034d3d483f68 SHA-1: 74e68b2c56753aa6ff0532237be638615d27d9fd SHA-256: 2d5a0c1e9d1fd054335fb9100da13c5ac6197b1ffd665c33f07faa9ec29de4d2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam lure. It contains numerous links to external PDF files, many hosted on compromised or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://uleshuzatshop.hu/files/file/gorazofes.pdf
    • https://q-web.ro/wp-content/plugins/super-forms/uploads/php/files/0ed78o3jmk7p0fc260ge0t3sl1/18473173094.pdf
    • http://timeyear-v.com/userfiles/file/79699846542.pdf
    • http://www.biotanika.pl/upload/file/ralewapagonewafelo.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aec98c2f547---21911397176.pdf
    • https://coolinterier.sk/upload/files/61058415569.pdf
    • http://apcmagon.com/userfiles/29932582954.pdf
    • http://aps-mes.com/files/file/6039359141.pdf
    • https://acryl-bg.com/userfiles/file/16576222983.pdf
    • http://vakoplus.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/33893888406.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/d84475fde51b6eec1af2dad5af9d6590/67467097741.pdf
    • https://bursakaynak.com/userfiles/file/mofeguwabod.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/27a46438715388a1e6f318ccc079c814/gimekasotojosexo.pdf
    • http://cpgny.com/userfiles/files/46609983737.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d78b0520f1---volobimozifuzujuzozik.pdf
    • http://www.jindatunnel.com/up_files/file/dosigalafofelobeliluziru.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/a1729ecb773d55b5acd02ec9d40cb8b1/31481100734.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c7b490fbb---xunafubo.pdf
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/8326d774369154ab3359b81eadc28993/mujevupowesizelefir.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/5c3cfd147104c5c7b86a1f19497e704a/xirobinarimotarapi.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf12e70608a---sisibutixi.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/3405d77d90d193dc13e9586179ffa5fb/dabiburadaxadejaxugas.pdf
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d82ab39fd35---sobufonukulazapewipokezis.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=does+arby%27s+have+2+for+6+fish+sandwiches
    • 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_off0000dd83.bin
ba75cc48380b2dad54a25de0b97b7e3a1dac404fdf753c5a4008ca92ce91b1d1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD83 18120 bytes
font_01_sfnt_off00010d49.bin
3acb48bfae43eaf53c0bc95fe6eebc6215268007115c5404fb19c21d1aaa482f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D49 11156 bytes
font_02_sfnt_off0001277d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1277D 16792 bytes