Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0155ea1aaded1d…

MALICIOUS

PDF

81.1 KB Created: 2021-08-27 17:32:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddae984a21a4fdcf061475295306970a SHA-1: c4c8729d610d4ac61156e4b82f4b614ccf7b35f7 SHA-256: 2e0155ea1aaded1dddc005c9657947b6b219d38dad95e880526056034e561488
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external URIs and link farms pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a site that serves a malicious payload. No scripts were extracted, but the PDF structure and embedded URLs are sufficient to infer a phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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://pixomot.ru/uplcv?utm_term=download+first+aid+2020 PDF link annotation
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c65331236b8f09e3fc500de818c7f005/kurejixopuwabatevi.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/zedeju.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/f9316dfc2f2a7dc982722b775dd29d04/lofusumosumiripozafevu.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/11492695609.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/8sb5r4rg194v108gpe7jsm47h7/funedojesoponisanetibu.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/80464901519.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/de6933234966bcb17afbc2fec603ff5e/xakovavoliworo.pdfIn PDF document text
    • https://promise-land.com/upload/file/nogafinupowati.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f232877b4e8---japapopu.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/k8l85e0hmc5r0lo3m5ienkjnb8/9260054576.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/wurek.pdfIn PDF document text
    • https://penal-garazh.ru/files/5871516054.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/liwipibinupinerizizozela.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/53cc3af90c41865179d34472f301347c/5708150551.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/21688932593.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dac9659c44e51de8f322d0231a9e1b7b/36126659543.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b84c1eec53c---jojodoxajukulolafawulo.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090cb7044959---sojidaj.pdfIn PDF document text
    • http://tasarimak.net/ckfinder/userfiles/files/36690510961.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8412aab27---73985074404.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/e25d825662d374db7064f28aa5aeb7d2/repekisunuxit.pdfIn PDF document text
    • http://everettsbarbque.com/clients/b/b0/b0b566c85bab127526a414587b81487f/File/zexogolunavuvorivupiko.pdfIn PDF document text
    • http://artospace.com/pics/file/sapodotilobokira.pdfIn PDF document text
    • http://bbu.vn/Images_upload/files/xetexapo.pdfIn PDF document text
    • 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_off0000da22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF239 10544 bytes
SHA-256: 16128c6a75b3552f075e0524ab86298ecb621c2b060945306c5c4edc5af3e785
font_02_sfnt_off00010a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6B 17216 bytes
SHA-256: ccfc869822dbf0175ec3c27dd0745344ee499b0fed4f007976e701909e61a74d

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