Malicious PDF — malware analysis report

Static analysis result for SHA-256 72019e07ffbbda2c…

MALICIOUS

PDF

85.0 KB Created: 2021-07-05 06:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 577a2ebf244bb016ee277d49adde39fc SHA-1: 0bf70f8c31b51d3c463b4fa3f4d7a0530b0a59cf SHA-256: 72019e07ffbbda2c551955ba7227e789b00e6a2778ba79cb00663784c59f8931
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs further support a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=place+of+adverb+in+a+sentence PDF link annotation
    • http://ateliergermain.net/sites/default/files/file/letaxobenadezefusazufe.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ad624a58e2e---19949067918.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d85be9210---32255879996.pdfIn PDF document text
    • http://voxel-avocats.fr/uploads/file/9040204725.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/93497006803.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/da65b74525f22b7a09517cf67f5255fc/kowafujuvebupezabel.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/a79b810fdd04e0ba8b56916fc7ec4ce4/wofumigolotarev.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a62aef1d0be---29131816925.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/zekegosijapibudapixa.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9d63b38d5---71474037010.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/45282741327.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788b561e17d---zinikemimajabija.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/128651015460d7bf6fe30f4.pdfIn PDF document text
    • http://anma.pl/anma_edytor/file/5286884162.pdfIn PDF document text
    • http://dribblebar.pl/userfiles/file/52991600744.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a580ce1e32---dilebapapapudigesi.pdfIn PDF document text
    • http://jonkmp.nl/img/cms/file/tezinipunemawokutigisu.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/bkj4jh43nohe90a4dq3v8nioc6/lepavepefosewosevolu.pdfIn PDF document text
    • http://dzbnf.com/upload/file///loroxew.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/be395270189c4b2286ec834db9996b0d/lokibufavabaxovora.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/jijiwufivasixigupulisin.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc65e171389---99062124017.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ujh9gbck3lgkcctbgi3sfunf89/ponolunibumitubebejafag.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/4bc9eb52bc893c7e50f47e82805a2f41/gapalufoxuguxevodefepusa.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/35596703607.pdfIn PDF document text
    • 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_off0000e7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C9 10676 bytes
SHA-256: 5d780a963506898d07f4dd9f1a64a7dc6a049c5e94b0156e365b122f2a4babe9
font_01_sfnt_off0001006c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001187e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 17188 bytes
SHA-256: 8cb668ac6a83c6bc570a39c28541cab7fb549bc84ef39ca9d2d801431a857450

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