Malicious PDF — malware analysis report

Static analysis result for SHA-256 885d7906daf7c3ad…

MALICIOUS

PDF

86.8 KB Created: 2021-06-28 20:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9d34635027529d69a58275cb4c8ee80c SHA-1: f925b56664484394742211e83f1c38b8dd8b3c3e SHA-256: 885d7906daf7c3ad13ace286990b9b17a96a421adee0fe812a9f1fc3a120fdfe
196 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection. The presence of advance-fee scam language and numerous links to potentially compromised WordPress upload directories strongly suggests a phishing or fraud attempt. The document's primary function appears to be directing users to external sites that host further malicious content or facilitate the scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://airsoft1.ro/files/file/pufafu.pdf In PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/00d4eee4f8685081579fc16395ce8b21/ruberarejumipepujulobiz.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096a981b426e---81092269362.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d8b7755a7---bulilomasusadojezel.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/56a83ff0c5219da360bbe6737c6d6412/tolabitedikowir.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608197b2594fd---rurejugobukuxegum.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b389b3158---39174644380.pdfIn PDF document text
    • http://tecresconsolidamentorestauro.it/fck_data/file/bitajariwo.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/fuwukebosabivedowimig.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/ea855bfea8676d8134ab992209fa0ae6/78942375365.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/77d59b6c3ce332386d32ca1406183cf7/wuxunupege.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-6-27/20210627151936255008.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607db399ee4a1---91676494057.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/b459336a2c09d0d800ab054f1fc49873/58664227917.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/kamojagisabuvuvimagira.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/7gde8b8h017ps8a96eaqd2jb9s/rorukixarozu.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/bb7ed1ce168844176e4f24c88abf919c/feropiwavowoma.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/zofuguxazipil.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/xipimividibudigelidole.pdfIn PDF document text
    • http://chapelguild.com/images/usr/pogonejatuvuworameta.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/omlfvg8fkd8enq0ps61pvb8obf/80190559426.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6c548a8065---90078260122.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/45300022110.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/pebobexitofedinog.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7e41a0f38---56781898518.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=let%27s+talk+about+kevin+moviePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A9 17256 bytes
SHA-256: 6ea930cc91491b07e8da9ebe8753a80f69987f728408b7a30c2c3e3b9a2bc658
font_01_sfnt_off00011dc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC2 10556 bytes
SHA-256: c3abbe38936c7f488fbfee96dd2932b614f8a6c966e33b6652a1aa89cb6fe108
font_02_sfnt_off000135e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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