Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e0a6606e790a1a…

MALICIOUS

PDF

86.2 KB Created: 2021-09-24 09:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9453861fe98617c78d0a8c5e66fe5873 SHA-1: 62946797c69c904f028fea755db93e136374efc2 SHA-256: 05e0a6606e790a1a48078ea47521a16cee55dfd0a0ad9dacc613f45068841c71
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of malware. It contains numerous links to external sites, many of which appear to be compromised WordPress uploads or disposable hosting, suggesting a link farm designed to distribute malicious content. The presence of a 'download button' lure further supports the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=vidmate+download+apk+old+version+free+download PDF link annotation
    • https://alternativi.brtim.com/uploads/wysiwyg/files/81468080880.pdfIn PDF document text
    • https://exihomes.com/userfiles/files/4427932862.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/zejumenitoje.pdfIn PDF document text
    • https://s-serviss.lv/userfiles/file/tawixap.pdfIn PDF document text
    • https://felicityokolo.com/file/gonimotowa.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/6fc2c0cbebbc0686fb640160e6c33821/jiwitis.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142cd4d89a92---850768330.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/kizufaguduwilipug.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145ff23e5dee---dotulopagaro.pdfIn PDF document text
    • https://ariconium.cz/webpagebuilder/ckfinder/userfiles/files/5033927.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/todiwowomulenikenikiv.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/wobukut.pdfIn PDF document text
    • https://hitourkorea.com/FileData/ckfinder/files/20210903_35D22E04933600BC.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/40415340236.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/26005487551.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/lumulate.pdfIn PDF document text
    • http://amandamaitland.com/images/file/dakegenirijinatesopofod.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/4511485226.pdfIn PDF document text
    • https://carlojans.com/cms/file/divovitonu.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/6ab7b6a0497b21d8ae4f5c09b934b923/99423037196.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/95879793375.pdfIn PDF document text
    • https://concurs-euclid.ro/upload/fck/5324412733.pdfIn PDF document text
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/1vq7t4dlhaenivbs3l7j3mb2q5/bowutaj.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/92825713990.pdfIn PDF document text
    • http://villaelen.it/userfiles/files/53658332698.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_off0000e7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001000c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000C 10872 bytes
SHA-256: 43a471ab9d1f772ed555bae3b8eb1de04d15880a39a9a8a73df67c91e1411866
font_02_sfnt_off00011934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11934 19316 bytes
SHA-256: a1b8ef22b7b4d8b31714f7d936464f26dbab2d9ce8fe5a3347d9e40c6611fc07

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