Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ad8e2bade6ace5…

MALICIOUS

PDF

78.9 KB Created: 2021-08-29 09:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1256b4ee5e063fe5c0f95febb1f308d6 SHA-1: 9065812b513055a4f48700a815301c713f301190 SHA-256: 60ad8e2bade6ace5986183d58964e9e27d3d60f096c1d9a2163ab193933aa538
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS uploads and disposable hosting, indicating a likely phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were directly extracted, the PDF structure and link farm heuristics suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://irlanc.ru/uplcv?utm_term=cost+of+equity+capital PDF link annotation
    • https://alyosserspneed.com/userfiles/files/gisejumowi.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/zivisifutigaw.pdfIn PDF document text
    • http://ligneus.hu/upload/file/lirafobekutonuwozexixifej.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/4baab411d00e03de3725ede98c328147/lijodujawi.pdfIn PDF document text
    • http://cbgnfinance.com/userfiles/file/kinejojafo.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/veluxeto.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/23516491862.pdfIn PDF document text
    • https://fundoohairstyles.com/hairstyler/images/file/gukugaxiraguvividara.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607943a048914---22530925803.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c522f523b1a---64986444687.pdfIn PDF document text
    • http://fence-alarm.com/userfiles/files/92498851574.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/3643f313cabfb87760dff80e9a003b8d/73262009258.pdfIn PDF document text
    • http://countryclaim.cz/userfiles/file/96436775261.pdfIn PDF document text
    • http://yule-sign.com/upload/editor/file/20210601125502.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610a25725480c---xorabunixafozujoxu.pdfIn PDF document text
    • http://accronline.com/userfiles/file/84679991651.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cfd3ecabf649f3fccd3a38fdfdfd80cc/16778272805.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c053548e084d2dbb022d5f0c61f38508/97959892313.pdfIn PDF document text
    • https://jagamimpi.org/contents//files/gobinuzo.pdfIn PDF document text
    • http://soles2walk.cz/data/file/93329244820.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608124881f0db---tedijovanelolofuka.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/papatefawelun.pdfIn PDF document text
    • https://badoza.net/userfiles/file/vakipukone.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/mrgk39frcm2bv3b0jkset0epop/rixijo.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///82272477881.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_off0000d132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD132 17140 bytes
SHA-256: 7e57052daba2109e05561111e6ca5d43f80555ef0f736d76fa775791c5c36d37
font_01_sfnt_off0000fd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 10660 bytes
SHA-256: b7ab56d8c67a2afe9cf630a38b7900d522b49897e615ae4effeb0b9a8ac3efc4
font_02_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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