Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dbf7f4840a171c9…

MALICIOUS

PDF

93.8 KB Created: 2021-06-30 00:42:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40c1e516e0e8b66c06c75a43e584c2e2 SHA-1: 06ecbbd2a02262af5e9b72cf43234a986cf0891a SHA-256: 1dbf7f4840a171c9cc9bb87e1d2201e5569da04695925b5ca4d5b4b284b61f09
196 Risk Score

Malware Insights

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

The PDF contains numerous URLs, many of which point to compromised websites or link farms, indicating a phishing or scam attempt. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests the document's purpose is to trick users into paying fees for a non-existent prize or parcel. Although no scripts were explicitly extracted, the presence of PDF_URI and ML_NYX_PDF_MALICIOUS firings, along with ClamAV detection, confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 https://drafthe.ru/uplcv?utm_term=1001+questions+and+answers+on+pesach
    • http://gourmethousemacau.com/UploadFilesfile///18776319180.pdf
    • http://studioagronomoserragiotto.eu/userfiles/files/fenasigojisuj.pdf
    • https://noihoithanhtuan.com/media/ftp/file/lajesi.pdf
    • https://thuaphatlaihoanghuy.com/uploads/files/legulukapasejaxoxesivig.pdf
    • https://syntellect.ru/Repository/file/zumawegusasa.pdf
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/8ht5puva9m5vo7c4koo3fbsjp5/14661531709.pdf
    • https://alakharia.com/public_html/userfiles/file/zovederofitar.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/ad31b036f2fd0419d3575c90aabe9959/19007058288.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607191dd3fb03---40546930915.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/cc4a36acfe6a009f6ba60d7b12618ed1/titolagodajusiverofiti.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd71530c63e---20912051048.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090c9a446712---posukekaxepimetukojijede.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8cff3156fa---93884931029.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/30c9aa2df57661bc322c882c2a6abd9b/pezopawimu.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160892bdd2755b---kuxodoberodafoxuwup.pdf
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59ed5a4a9b---92477860843.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079940d3f2d0---womudizasivegojozu.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/otddria5v2us4u2ugcab5hk787/26141639177.pdf
    • http://visit-pune.com/userfiles/file/naviluligawufikaxurekixaj.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/6a20f01433d8d648c30dab6c9626c0d2/4612054780.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/82132070688.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e959.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE959 16792 bytes
font_01_sfnt_off0001016b.bin
ff136f47e32293b11d8f21b93826037fc41b1c28c68a54105ce49feabff89190
pdf-font-stream PDF embedded font (sfnt) at offset 0x1016B 18040 bytes
font_02_sfnt_off000130a5.bin
655d1c7b6b3ffb5f119ad7838d0a20f4e47af3eec0c1a81d421caa43236cc208
pdf-font-stream PDF embedded font (sfnt) at offset 0x130A5 10972 bytes
font_03_sfnt_off000149ee.bin
325122fd11ca042c3eeab9bb53fe5b0bed086a1d461cbff80c419e0b872aeefa
pdf-font-stream PDF embedded font (sfnt) at offset 0x149EE 18956 bytes