Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f9768c3dd749af…

MALICIOUS

PDF

101.6 KB Created: 2021-06-27 21:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3d40d1a72380b77d9aa1ec4f5f8dcda SHA-1: d90aad889ca658ea38e05d0c280e2a409a8d757b SHA-256: 14f9768c3dd749af0f8d14149ecf5888f2f001217ec2ee33d1273030eb897205
196 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malicious content. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/27427411580.pdf
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160818e8c15274---82707641933.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/64879224738.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6965a960b8---29321327096.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609275094c5da---sedubemikuzodajiz.pdf
    • http://mbcasc.net/imgs/file/kexetoguxuga.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a1189a67ef4---26454418247.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d52ef2b12d---vepizupan.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160754b8523ade---4065236867.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/ad3639cd64e04fc96a5af9c5dd0abfb1/jinawixosotegapijar.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608328ae418fc---88493944000.pdf
    • http://geose.ru/userfiles/file/95790496953.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b90dc2469---govuzepusu.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/970aa91213ef1df05f6812b8207266c6/33271665807.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q8i4rl8l296u8etoa8qcvg4ms6/72591081873.pdf
    • http://metapolar.hu/tmp/xupukebinuguwafadami.pdf
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e49a3053b2---36259747010.pdf
    • http://jump360.co/upload/files/20210616081358.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/69f3af7254f9e8103b66278f0f081a19/63793748131.pdf
    • http://aarogyamedico.com/userfiles/file/kamajunuderaripejo.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16084941c01310---71631488398.pdf
    • https://acronimocostanzo.com/userfiles/file/lanakax.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6d946254e---44989942552.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=normal+s1+s2
    • 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_off00012a59.bin
3dbaf2682a464908b19797e183f0f2168109217fd01e8a33bd316bdba61302b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A59 17872 bytes
font_01_sfnt_off000159d5.bin
01d16e55632a52c0f04dfea87134d0fbe742af843a623b6a8921408991ed432b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159D5 9992 bytes
font_02_sfnt_off00017018.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17018 16792 bytes

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