Malicious PDF — malware analysis report

Static analysis result for SHA-256 047ecdfde0da069b…

MALICIOUS

PDF

89.1 KB Created: 2021-07-29 22:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7bc67d034935f4110159f20fdadc5632 SHA-1: 93ccda301b311dbdec425827c7b6fe72405aa5ff SHA-256: 047ecdfde0da069b5a4badf41afbf9e16fec409201a7b693b693e941aa7f8557
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The presence of numerous links to external resources, including those on WordPress upload storage, suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/73kg7krtmp4v8i8c3asc2csk34/83964719850.pdf In PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083dd74ce3a5---gumadoxadinukuxuxapirale.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/3oqaiukhf2738a8ifj0i7tni4c/napaloz.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609884a613906---piluwutigegukibovitubube.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/99418966530.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/028df63d9481f30a34566d6ecbbddfdc/88994957647.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f28336bf6---70193158368.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/4fbc5eb678c14fded2adc2ba8c05c8cb/82956273312.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/40450567147.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/vimulovaramulunin.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c66dba25e---92964116711.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/pogadatotaket.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210628011357.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/3015780923.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/84426478277.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58467218707.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097ffdd24f79---20462841824.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3848e26095---lofotupiwoxilazudebuxanus.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/n9v97fjmnslpteprved61vpec5/5945744777.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/391b621d351296e0cc57383e0b1697fa/98681044362.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b27690564c2---25906263275.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/6gvi91if08qcar1f0pieh5jt47/kiwegonokojawajin.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/lafopimupiwugivagonovaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=oxford+read+and+discover+level+2+camouflage+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE97 11276 bytes
SHA-256: d4bd0a75ca9c56cf8bdff5dbac5316406ffde2975d4084f657bbaa12e2676237
font_01_sfnt_off0000e8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10103 16848 bytes
SHA-256: b5efd151e792631d850290b87e8dc91c8716a343dff0990b918596a569f71481
font_03_sfnt_off0001193a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1193A 26460 bytes
SHA-256: bf54f5439ed6be61f4c923312d8f60fdbd3f936589797e272bb460e463d3c0b8

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