Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f45988bd4650d9…

MALICIOUS

PDF

89.5 KB Created: 2021-09-16 08:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: c53ec7057167f9f7b2618dd20d02e127 SHA-1: ade94bdf79daa9afca701c93a09f16d78c6a9627 SHA-256: 96f45988bd4650d9a734a04b2fd6e39111c41370bca6762f3675a1f1dfbe4197
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a callback phishing scam, as indicated by the 'SE_CALLBACK_LURE' heuristic. It contains numerous links to potentially compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or redirect users. While no scripts were directly extracted, the presence of PDF-specific malicious indicators and the overall structure point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://goodtraefarm.com/ckupload/files/xixerumezevunopenutezoz.pdf In PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/tubodozefixorerojigute.pdfIn PDF document text
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/64548454830.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/11635154388.pdfIn PDF document text
    • http://circolonauticofavignana.it/userfiles/files/lonosoz.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/p1fdqcit3f6bqqtkm5ij5s4vfh/gutedekeravozerara.pdfIn PDF document text
    • http://didopack.com/files/25153259289.pdfIn PDF document text
    • https://netcsemege.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/kufeleburaladiwabulero.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/92566722059.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/kosedowewidedikero.pdfIn PDF document text
    • https://angem.fr/userfiles/file/tuwoxekuvuludatu.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/811616452612fe8323da43.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/e5d4368088322c412a9ee0920d76b280/kidizijuduxoruzamix.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1e7b0781d14501703b2502b04219629e/35609849285.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/17790617039.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16137d36ee0b84---96058110976.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/88028663339.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4194c6d71---rapifefadofusele.pdfIn PDF document text
    • http://arsvet.ru/img/upload/55830998421.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614161fbbe985---22587641720.pdfIn PDF document text
    • https://pielinks.com/UserFiles/file/45169710971.pdfIn PDF document text
    • https://matratva.in/userfiles/file/46576774232.pdfIn PDF document text
    • https://www.restaurant-latableedevercel.com/ckfinder/userfiles/files/51173748046.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=god+mode+gta+5+online+ps4+2021PDF 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_off0000eab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB2 22544 bytes
SHA-256: 87dfa0d44accc215b53d1f1a9ab2ece9fe5cf63c7875a4e78cf92cb4cdae3832
font_01_sfnt_off00012614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12614 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E2B 11180 bytes
SHA-256: 2c36e6b6c11107fb397aa0aef6143fb502f8d05aa0ea512414535930eae52917

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