Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e4e12c860b19b5…

MALICIOUS

PDF

81.1 KB Created: 2021-09-14 10:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c416d5c65d19c36d58a9f95308de2ee6 SHA-1: c7889269816bc964462d686380dd38f6a2708755 SHA-256: 07e4e12c860b19b5decad856d927c605754a727f67cefe0a3fa047ce43dd1d1e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of malicious intent, possibly for phishing or distributing further malware. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://bogaarchitetti.it/userfiles/files/29306711453.pdf In PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/70195296326.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/tiloxefasagawusek.pdfIn PDF document text
    • http://www.77ice.com/upload/files/95129866593.pdfIn PDF document text
    • http://yuli-china.ru/d/files/53736574525.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/mofamamijin.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/zinikerakabajax.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/37646598902.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/6a24a0cd65f60c73082763811eea4ad4/61436564040.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/zesizajiv.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/57117364527.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/92550505734.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/89674147530.pdfIn PDF document text
    • http://youngshiny.com/userfiles/file/1631335715.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/30361137012.pdfIn PDF document text
    • http://abwwilson.com/uploads/files/kezepow.pdfIn PDF document text
    • http://bellamy.tw/uploads/files/202109102320407963.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///munozimexut.pdfIn PDF document text
    • http://wwsm-us.com/files/file/34932688859.pdfIn PDF document text
    • http://veterinariogiardinelli.it/userfiles/files/wesewafexekajesuwosevural.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/petitomiwuziwajadewiromo.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/raduvux.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/39923664301.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/31086791502.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=redmi+note+9s+camera+qualityPDF 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_off0000c814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE026 23232 bytes
SHA-256: 9e71db46e994951ba40f98500ac699cc6db488a4bb4caa8647f8aecd90d9f5e0
font_02_sfnt_off00011bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBF 11104 bytes
SHA-256: a5934a01717fde6c7c2669cb7fadf0096a846e43b38c3d620df0731bcfaee74e

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