Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e56d694690586d…

MALICIOUS

PDF

72.5 KB Created: 2021-09-07 01:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7a6c278af847c6ca0cc3dd214bac4b4b SHA-1: dea071f358b16057f8decf618fa5eb18cd48e5e5 SHA-256: 16e56d694690586d8d8e30bf1d290311b42544723bf733be31ae5f3c8ee439de
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Multiple heuristics point to the file being a link farm, directing users to various compromised websites and potentially malicious content. The presence of embedded URLs and the nature of the heuristics suggest this document is designed to redirect users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pistant.ru/uplcv?utm_term=ricardo+bofill+visions+of+architecture+pdf PDF link annotation
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f544da201233c8d178c46b32da8961b9/99337355990.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/42b6e1a2e87e71d58470b9790a81c77c/xeserejuribegilisuta.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/33302547813.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a62b56d2---rulupilujomofawuwetaru.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/4331b5b422871235cf10aff9f4828bb1/pobafejamiletifavowigod.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/59220146630.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/61517177418.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/jetirilad.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa8fc2539e---84980998361.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/8054674953.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/5d38809efd4a828155ee37cb317403fa/berumiras.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4d82a9596b---fakonu.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/gp622kict3ne2qbilia62q57bv/tugewexigogufamaxipodalub.pdfIn PDF document text
    • http://zaragozalawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xilefutuzovijesimez.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/11832047602.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/nabakirabizadim.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/97994970419.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/96755784299.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b7def4b8c83---wekoxalijolesirubapuzoti.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/gazodopawizisemoriforasu.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071b47957990---52741613286.pdfIn PDF document text
    • http://focostrade.com/files/20210622081524.pdfIn PDF document text
    • http://reguitti-engineering.it/userfiles/files/66108249952.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/894224169.pdfPDF link annotation
    • http://davidlbrooks.com/clients/868292/File/99927697790.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/28998308382.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_off0000b977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB977 16144 bytes
SHA-256: ee93631150a062b9714e21bdf52237d2735a698c6eb3a87e9d6564b24ca9d39b
font_01_sfnt_off0000e28b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000faa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA2 11068 bytes
SHA-256: 5e0119af4e007950616c187fa97db9b50b5d31afb6f7c3f5142dcde7b01523d9

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