Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3c75b7f61fb7d0…

MALICIOUS

PDF

81.6 KB Created: 2021-09-08 00:24:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5d7f9851a68c30fc8504f14795c7824e SHA-1: b3d867dd319641ea904876b927a73649d8781aa0 SHA-256: 6b3c75b7f61fb7d0b2d5fce785aa1aecec10e11b52a1272a22ec977e820f9105
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

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 http://teraval.cz/res/file/xofonivujomebenezafo.pdf In PDF document text
    • http://americasbestmanassas.com/uploads/files/66651830132.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac41610ee87---xowepufegomipupexop.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/21649296041.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4565b71b5c---29867839071.pdfIn PDF document text
    • http://hollywoodterrace.org/clients/863344/File/gezikivavevaradut.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/bc96d6d4492ed971376ee1d64d07625f/70932337116.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/j0c3ekolupahu429q0fnupj5b3/moliza.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/2545c859d22086d7ae471a385b431e80/wuteruninizowe.pdfIn PDF document text
    • https://birudongker.com/contents//files/galejipebexotojoxulo.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/gazolupuru.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kirubotexiteremipixuto.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/vujinenosebutusale.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/zawokuxoven.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/16678372117.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/vodisenutigavalugur.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/givugiwog.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/428362529.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28415af34---43896594771.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/9892981598.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160d9b08e9af9a---luwexonosogireramew.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/38846372970.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/masebebuwijala.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/bujajipebusuratutix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=covalent+and+ionic+bonding+worksheet+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_off0000d9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A7 17328 bytes
SHA-256: 4373f8b79bd0260da7edaf162a21a0ed2950390e0bf1642e3a8cdc4b10f72655
font_01_sfnt_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4D 11316 bytes
SHA-256: 7b2591876eb668fb48bc4c31067fb5948311059970a2a74adc0cd2805be9910e

Open this report in the interactive analyzer, or submit your own file for analysis.