Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e9b77eee2e7965…

MALICIOUS

PDF

83.3 KB Created: 2021-09-15 14:23:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ed7f40717357622713da40c670d4d107 SHA-1: 00526ed748e32482ba8320836a0758963d0049a5 SHA-256: f0e9b77eee2e79656fa549bf0f08099612fa041be1f2a9319b2a8879304ace6b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam pattern, where the document likely prompts the user to call a provided phone number. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://dmshospital.com/mm_engg/files/mapafizopukobotinudijupu.pdf In PDF document text
    • http://americandeliorder.com/uploads/files/27204987319.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/vonazawalakonafabozeluku.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/efc4d74e2cb7854f9e8209b4284f1888/47560751669.pdfIn PDF document text
    • http://vanprodukt.cz/UserFiles/File/toder.pdfIn PDF document text
    • http://hanauhrova.cz/files/7874219858.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/77346980172.pdfIn PDF document text
    • http://polimak.pl/userfiles/file/kigegos.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/161335c5da822b---81902061686.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/rafokezepafaxowe.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/79528411276.pdfIn PDF document text
    • https://phr4u.com/files/zufiluzekusogejobilukodik.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161395fce54194---58946883465.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/75368794193.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/file/sabotemad.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/tokafutasetexe.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/suwinigurunalof.pdfIn PDF document text
    • https://mlmrockstars.com/ckfinder/userfiles/files/42689023166.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/6d42d2c42f66bf4c40f0b9d19c21de67/26420237594.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/94369268270.pdfIn PDF document text
    • http://balcimimarlik.com/resimler/files/42649788328.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb26eb2f49---34245762495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=final+fantasy+vii+remake+apkPDF 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_off0000e0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 18304 bytes
SHA-256: a77922aeceb30bc4da19961f9e952a1dd5e3dfee5e69b25fc2505390effe49c5
font_02_sfnt_off000127a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A8 10648 bytes
SHA-256: 2e117f80afb43a26af0b38534b2ee2f5ac426dda99b0493ded8ef905723be6d1

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