Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f5878383dc2b158…

MALICIOUS

PDF

70.4 KB Created: 2021-09-10 01:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: cc18e64de97686f63276ceb9a2e52b78 SHA-1: ca7875b7408fe00a80e9c04fee1b2615bc0848d2 SHA-256: 5f5878383dc2b1581c06478d7383ddb864000bccca0c8b94eb4a92476c20d379
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The file's structure and URL patterns are consistent with a malicious PDF used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://queure.ru/uplcv?utm_term=watch+boruto+168 PDF link annotation
    • https://sharpconsulting.us/app/webroot/ckfinder/userfiles/files/pedefatixazolevexiwe.pdfIn PDF document text
    • http://dr-temt.ru/images/file/gikotiril.pdfIn PDF document text
    • https://themalc.org/files/file/26660222038.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/73441769491.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/32810935347.pdfIn PDF document text
    • http://newbusan.net/FileData/ckfinder/files/20210910_E297AC929CEACC90.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/xudowufid.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/juvatemosumujagarik.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/d1c14661c5a99dcc163db9c149f4e2e2/sejevivo.pdfIn PDF document text
    • https://callmarkinvestments.com/callmark/files/xinabo.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/xurufojavodinaxalisisep.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/43848334729.pdfIn PDF document text
    • https://eurosan.pl/user_images/file/pivolujefinekoguve.pdfIn PDF document text
    • http://goldsunjsc.com/upload/files/fewigilitabuwilopegol.pdfIn PDF document text
    • http://nemeckystrakac.sk/editor_uploads/files/23115907880.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/bipapa.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16134bb0b88c98---76861222242.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/81299501974.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/16898161082.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/jerepudomijufuzipove.pdfIn PDF document text
    • http://ducthai.vn/userfiles/file/kuwezazunerufomoxokiwurit.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/hqvj2gn8amc433c1mn8g8gujf0/24906205593.pdfIn PDF document text
    • http://jawarakreasi.com/file/77632528164.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/zodotuzepuwakikurezif.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/pojapafifeduxelebixis.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/47075266252.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6C9 14880 bytes
SHA-256: cfaa7cc887e1d34adc623c0e39313d1bd631ac37b388cc2b45361bfe3ab0dbc6
font_01_sfnt_off0000dc06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC06 10448 bytes
SHA-256: 07eb1c1206ff60aeb781ceb1603314144c0ea72caf22a57d6e23fad8e4b5ec48
font_02_sfnt_off0000f3f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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