Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94aa55cdc42ad2f…

MALICIOUS

PDF

82.0 KB Created: 2021-09-03 04:08:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 785aad53a896822a71f76313cc4d179e SHA-1: 349eb8cc9bb158727f63de64658279513df12a55 SHA-256: d94aa55cdc42ad2fdd6893a6bab0f4168fe75fc22edc102c8595eb456c42954b
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, suggesting a link farm designed to redirect users to malicious content. The presence of PRC/3D content and ML classification further indicate malicious intent. While no scripts were directly extracted, the overall structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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 http://ohana1bbq.com/uploads/files/pevefugezonewib.pdf In PDF document text
    • https://zohopinler.com/calisma2/files/uploads/91520080214.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160e8cf6db670d---88396346631.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/68856178888.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609d84f5bc7b9---xozopux.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608107bedd310---momasimuligose.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d73777d9b---debidozimelaxubomuxow.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/40790739865.pdfIn PDF document text
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/peritifujuvowavuxar.pdfIn PDF document text
    • https://khangle.vn/uploads/images/files/badivufele.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/sijovujelorafulijodoluze.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/0ktdfc343cgjpl99rgutomu5ac/8887082624.pdfIn PDF document text
    • http://asbazainville.org/userfiles/file/xuxewerovajezi.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/mixuxigilinuniximex.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/wevev.pdfIn PDF document text
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac9f056e761811c63d7904e901626d0c/77587888762.pdfIn PDF document text
    • https://voyageaventurenepal.com/upload/files/58240543146.pdfIn PDF document text
    • https://shidoremicrosys.com/media/nurimozanobezusotasojegun.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/nreho7hm2n42go3l8bb5mo1qa0/88087724109.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/94135860812.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608d98f27ca71---kipadetujenawi.pdfIn PDF document text
    • https://vetregistr.com/ckfinder/userfiles/files/97238246820.pdfIn PDF document text
    • https://thehouseproduction.net/file/bufosozoxevixos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=health+benefits+of+citrus+fruits+pdfPDF 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_off0000decc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECC 16428 bytes
SHA-256: 1c9f7fa08cf3a07a68d1cc2603f698a7d1d6a1ecc6700e47836e19a70956b706
font_01_sfnt_off0001090d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090D 10948 bytes
SHA-256: bb725fdce99d1c32d591efe8595513f38bdb3fe5eef25ec47cdc69007d436d6f
font_02_sfnt_off00012212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1