Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f1f723c6df850e…

MALICIOUS

PDF

83.1 KB Created: 2021-09-18 19:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 54f9ff8bb40f95d73c34f90a7a159bb0 SHA-1: bc702991cda2ed3820568d5d8875524dbd7df085 SHA-256: d4f1f723c6df850ee8ac4a849333304db53885da27944864ad986f007f0d2fc4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or scam campaign. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to prompt the user to make a phone call, a common tactic in tech support scams or refund fraud schemes. While no scripts were directly extracted, the presence of multiple PDF URI heuristics and the ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://siam-royal-view.ru/data/files/2689283687.pdf In PDF document text
    • http://cn-biyoute.com/d/files/83517657839.pdfIn PDF document text
    • https://millersexpress.com/userfiles/file/51713621794.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jejudozijonelaz.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161405e5648f69---jagekemenatosa.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/pijovijuborudukan.pdfIn PDF document text
    • http://yuhao-tech.com/userfiles/file/bawesuwugapefakime.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/63360699873.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/56528257946.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d032ecb05f---vuxijafonejogukijasame.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631325315.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/3a235d628bbc3113a64b774f247c86f6/vokosax.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/viworatilaxefujig.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/sarasewasewudajiz.pdfIn PDF document text
    • http://petswithlove.com/cvsprojects/SSK/Source/2.0.0/images/files/6061434330.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614298c8a5927---45785890963.pdfPDF link annotation
    • http://fourfoods.com/images/files/bivunagarelasefid.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/purekosovox.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/17790686658.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/virolilutamurifesanefevo.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/6268716891.pdfIn PDF document text
    • http://sarigol.kr/userData/ebizro_board/file/deziguxa.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c6d3b6681---fesured.pdfIn PDF document text
    • https://egca.fr/userfiles/file/lojewimexinewitepijeled.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=call+recording+ka+folderPDF 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_off0000e0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B5 18156 bytes
SHA-256: 60954779d86ae4acf947b27bb95c21805ee307b8b6d683b3931b3fbee0eb3db9
font_02_sfnt_off0001275f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1275F 10508 bytes
SHA-256: 3a0a5302f2fcfea7ae4a206a5b3ff4372b1d5101a156bb7ce878bcc817ef8fe7

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