Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7e68ec0a9d30dc…

MALICIOUS

PDF

87.1 KB Created: 2021-07-19 22:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: ba9c951c403479a405e779c0726a0126 SHA-1: ab9693a02bdbae7bdfae4b349ab779e1a31b8718 SHA-256: 9f7e68ec0a9d30dcecf5ab5fd40cea6215a2cb36f7e8e230182cc6bd7e5969cd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggests a link farm designed to redirect users. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing schemes. No scripts were extracted, but the overall structure and URL patterns point towards a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://euro520.net/userfiles/file/1620947308899891904.pdf In PDF document text
    • http://seventyfirstclassof69.com/clients/60772/File/vovozofokixera.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/56217370113.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1da9505219a069406e2bdc03642a42f1/28399282871.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160879af079079---17569492414.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160798fe55b6c3---28720800549.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/bafusadulax.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/18398166642.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/un7a4f4fr3dedsu9ati61p6pr1/57699955117.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/1f3b1f46b0906b1ec880bdf78641aeac/samafuwomizetizesezusud.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd4aeb1e49---nenokotukew.pdfIn PDF document text
    • https://ckmusicdesign.nluserfiles/file/tebajunudigekigam.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/5jusc9l63alpvs8g0b7iiuito6/85088486855.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/88632745188.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/42c919a94b753b237377b2c6a93fbbce/52251722674.pdfIn PDF document text
    • https://aashianarealty.com/file/xonogutamomaxuropemojir.pdfIn PDF document text
    • http://aircond.md/upload_fck/file/85089862547.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/ccb7cf64ec7a1537a7132903e563b4a9/43473588222.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/mojosigidakaw.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/gimotusafolonogadisijefaz.pdfIn PDF document text
    • https://securitydm.com/slicice/file/zirorukepifefudaripemuku.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/9268097030.pdfIn PDF document text
    • http://gsoutreach.net/clients/e/ea/ea4f28bd0b090870cbed8536b6d1d406/File/86370751800.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160db360eb18b0---vukobo.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/10036959099.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210611070934_vs7b8b.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=harkins+theater+southlake+showtimesPDF 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_off0000f12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12E 10640 bytes
SHA-256: ba3dbae3974e19fe2041e3255bfbdc81292d7f32f919db484134e4bb5c20063e
font_01_sfnt_off0001095c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001216e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216E 17412 bytes
SHA-256: fde7a6ad0cbca69825aad5ae0b523606058645f66b7300692909332e0d54b476

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