Malicious PDF — malware analysis report

Static analysis result for SHA-256 626e30c8e7c4ec72…

MALICIOUS

PDF

86.4 KB Created: 2021-09-05 21:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b342c37e370e5fbf19ba54e6dc384262 SHA-1: 96cfbbf7bc0167340465639767616e71883b70aa SHA-256: 626e30c8e7c4ec7271b8f36cc315c1ce9075aef40e0202ce1d105e708069e4b7
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on compromised CMS uploads indicates an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=hvac+engineering+books+pdf PDF link annotation
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/h20c9v7ogs0ahk8q77fsl6tc75/19460814387.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b0181fea56e---43011237960.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a465dfa1729---2397354535.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/98168437609.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/63876120154.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a6f0203ca---64481051034.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/32391006670.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/vunigakeliwafunidir.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/uhosnmebn72nrnmtod1iaclmj9/32458866868.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/7faf139103806ddbf5fe562f1aec5ba0/wibuxikolax.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/319ae330a6a49be025afce8401c8ad31/86672819807.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/c68e77464f23dfc07fcf5cb501bfb9f1/fuvosit.pdfIn PDF document text
    • http://logopeda-empatia.pl/content/file/raralebo.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d360599426---kanotajafubibuku.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ufq1lgi9knjfsalne7g9v4qrlt/gimibejuxebawugixi.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/rinujeredad.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/22838812254.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/varaterepobarifalusana.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jinofivuwogegimadukilo.pdfIn PDF document text
    • https://network-italia.it/file/3782886054.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/ximutujixelarovopevu.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/zepuvisuzidas.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/42978220199.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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 10940 bytes
SHA-256: d9e63a93e7ae1a9ccc4714752aa2742e81e66b06a2110f8dd4d9fa51ec511ad0
font_02_sfnt_off000119a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 19308 bytes
SHA-256: 3a4ffac886222f439e6c359e782d1c7d114ca92e759d10c77d4a266a770376f8

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