Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b8dcebf6edccf0…

MALICIOUS

PDF

86.7 KB Created: 2021-07-29 20:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 536f406ab9b8bf572408028c0b9b917d SHA-1: 240a1de263512ef551f9825efdbdf0044c921df2 SHA-256: f0b8dcebf6edccf0ce89d248a1104c58bce3eb5b0f68c4082918698ab659c419
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by a ClamAV signature and an ML classifier, indicating a phishing or scam attempt. The 'SE_CALLBACK_LURE' heuristic suggests the document prompts the user to call a phone number, consistent with callback phishing or tech-support scams. While no scripts were explicitly extracted, the PDF structure and embedded URLs point to a link farm hosted on compromised CMS uploads, likely serving as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6100ce303b---zujakefuruve.pdf In PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/eb05dcba045c9a6e323a084fd7c56fe6/towekimanibazorilatup.pdfIn PDF document text
    • http://taiyoaquris.cn/upload/userfiles/files/20210615164940.pdfIn PDF document text
    • http://aahsclassof1978.com/clients/b/b6/b6117739535924054831d33ecd54b00a/File/27881418842.pdfIn PDF document text
    • http://lalinpress.es/ckfinder/userfiles/files/82773328516.pdfIn PDF document text
    • http://worldnaturalfood.com/image/upload/File/59669591550.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/86954795550.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/modoxosogev.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/37305638192.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad141cf13ac---texusujuwutetesuzoxeroga.pdfIn PDF document text
    • http://phuvuongcorp.com/luutru/files/fesosetasok.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/1c0a0a4985aa14a9804e036f576d45bb/wujuzidoto.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/zabidaxoxubor.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/cknqadifhl724evar3ulrgqe66/29066618891.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6aabe99e39---besasegexesanoruxexoj.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/womejuvekelozam.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/39800381617.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/6a35a3fa91d163c1290f53c276f722b2/wujibosixefapuzafovo.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60c8ecbd3a99c.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/862bc415740cc864e156d188245b0007/70190640480.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0f4aaf1ed---nitamutomumifuvixojo.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/59171921727.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f5a6e348027e01ca487bf97a53a9d688/tisij.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/73510905983.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=mobile+sim+cancellation+letter+formatPDF link annotation
    • 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_off0000ede7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 17532 bytes
SHA-256: 625241d6af299efe4a4d2a49b8cb77b60c6fc23b78f3a14572bed8207f2bf6bd
font_01_sfnt_off00011beb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13402 10632 bytes
SHA-256: d26cb3db414afb600da1dd8a8a43e7bee8927dd59cd495e68647874f849ed054

Open this report in the interactive analyzer, or submit your own file for analysis.