Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaae487968243249…

MALICIOUS

PDF

78.3 KB Created: 2021-09-18 00:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 14fcae3384ef273329f98ac6b9ccfd79 SHA-1: e9186eaf2b9d87d055667ba0cc44395d19de6855 SHA-256: aaae4879682432496cbcedc57577a9e0d6bb6dba7a62f68291b19345ba7a56cf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting. The primary purpose appears to be directing users to malicious content, potentially for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/3ba667068b884cf5742168d6b89935ef/33749761309.pdf In PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/l0so56khheft0duqpnfganglum/8313311251.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/63093836641.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/967e402d1afe80c2b4276ecda47df95c/3846356039.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/16580460492.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/zejalafodenepaxirozegad.pdfIn PDF document text
    • http://ipai-bg.eu/img/file/gazugugarovatoxow.pdfIn PDF document text
    • https://lazdynumokykla.lt/userfiles/file/nolusexuxokezaxaze.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/b383bc6845bc131dd05279c597da320c/banovat.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142d69a7e90b---92686259841.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/nokuvegupumi.pdfIn PDF document text
    • http://pb-book.com/user_file/file/fiwovarunazebugixid.pdfIn PDF document text
    • http://saktigroup.in/uploads/tizofalu.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/difatakugom.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/kisaduvajunivozolugewox.pdfIn PDF document text
    • http://anabakorea.jp/userfiles/file/95591688132.pdfIn PDF document text
    • http://tunapvietnam.thietbiotoviet.com/Images_upload/files/68600106222.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/14955144889.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/zogetamivegamujafaxave.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/wumukapovefoxasume.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/sazanimegapotegojelijomiv.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/83025649208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=call+control+call+blockerPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB794 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFA6 16456 bytes
SHA-256: 49599325d9017814a109c111c9e38211522b3824dcdffb89ccf04ba6bf27dd30
font_02_sfnt_off0000fa00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA00 10224 bytes
SHA-256: c122e8b0e2a854d38601057bc8bf46a3aaebbe083a1da9baf8363a6fad67c803
font_03_sfnt_off00011123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11123 16920 bytes
SHA-256: b3c462f70becf758b74790427ce88f98d309c5d3d9f6c04c47214bd3253e6206

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