Malicious PDF — malware analysis report

Static analysis result for SHA-256 f17567341a7d71e7…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 15:58:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3a8b8d9fd17f867b80fe7ef48dd9b67 SHA-1: c6f494490793c736a70064c0d639ee59516e3cec SHA-256: f17567341a7d71e7b3d5d8446cac4a20eb1009a31c1c476262a953046ed7e39e
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a large number of external links, many pointing to potentially disposable domains, suggests a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for SEO manipulation or traffic redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161410eebb6fe2---38331690339.pdf
    • http://maskaevlawyer.ru/userfiles/file/kowozoluvafotijesidi.pdf
    • http://ersenergy.com/UserFiles/file/fudeponasalavilika.pdf
    • https://benmoonpharma.com/userfiles/file/3006053364.pdf
    • https://digitaldaya.com/imagenes/file/fomifupi.pdf
    • http://we2meeting.com/ckfinder/userfiles/publics/files/figuxod.pdf
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/musosapeguzirunamikila.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0932fbe847572eead4eb9763a768cbe1/13119859444.pdf
    • http://candybeauty.vn/upload/files/nimajikemowidinunegenelet.pdf
    • http://www.findvoters.com/userfiles/file/22961373735.pdf
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/larekevoxuleganupikeporu.pdf
    • http://azco.friend-match.com/upload/files/1763226670.pdf
    • http://dejede.com/userfiles/file/84627268415.pdf
    • https://ddtoyz.com/ckfinder/userfiles/files/wologi.pdf
    • http://hzqzg.com/d/files/kutidoto.pdf
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210914103000627449o63iap.pdf
    • http://rklatex.com/userfiles/file/50648297452.pdf
    • http://women-for-marriage.com/ckfinder/userfiles/files/84155532587.pdf
    • http://t-cso.com/upload/file_folder/file/472420195.pdf
    • http://erpsamik.com/ckfinder/userfiles/files/47588313592.pdf
    • http://nakloboucku.cz/uploaded/file/77679230497.pdf
    • https://promaxsuspension.com/csmimage/file/dadodode.pdf
    • http://locum-system.pl/userfiles/file/wirig.pdf
    • http://petra-dario.info/upload/datoteke/43316560025.pdf
    • https://paintingwithapassion.com/nbloom/fckuploads/file/pisevido.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=jabra+sound+app+for+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e364.bin
14ba3da8ae2fa16e16530bead08e7aa1520546e41ae3882885b5344d13afba78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE364 17952 bytes
font_01_sfnt_off0001120e.bin
6e6e8e0895a65d1824a1b5381ebea9b5fc7b933a0e139b634b444e3782e67416		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1120E 10448 bytes
font_02_sfnt_off00012992.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12992 16792 bytes

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