Malicious PDF — malware analysis report

Static analysis result for SHA-256 0474f23f6a1a19ac…

MALICIOUS

PDF

92.8 KB Created: 2021-08-26 04:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3673cdd1c245976efe5763323b62d97b SHA-1: 34d39e9ed5623344bb653d4581784cfc14568dba SHA-256: 0474f23f6a1a19ac74123a5e870f0b4d1aca4a996f48e6a79d3451ed7e6fa9cf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://queure.ru/uplcv?utm_term=determination+is+synonymous+with PDF link annotation
    • http://automotiveenergy.cz/userfiles/file/zamofiw.pdfIn PDF document text
    • http://artside.org/data/temp/file/fijexijolusoliwirugo.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160acd85d4d91a---kudulinedemepotas.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/26811768849.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image//files/88878239296.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/zotekegabazijisodokatulog.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cc9ceaccfff80e13d6165b93a09ac9b5/vewatavetiwobosazajokozu.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7376ad4db---75383507407.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608709e70ea72---70522173467.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c966ee1f545---46909066532.pdfIn PDF document text
    • http://stefani.cz/fck/file/juluzigawokumad.pdfIn PDF document text
    • https://bloomlight.pl/_bloom/file/wikujiniwumuvotamul.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/4483736101.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/26316530420.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad031490e1b---60226391024.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160bffb61b6e27---juvosuditajuvevur.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/7515851686.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2943f93d10---tapumawusijujevojuwadig.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c97ec52b87f---82852014567.pdfIn PDF document text
    • http://iphysiology.ru/upload/dusiwaxufapares.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d593e69e42---kifonuwa.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/6097ca83f033eafc08693f82cceff10b/57659521752.pdfIn PDF document text
    • http://tafgambiatours.com/userfiles/file/lateritowarasef.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/87114963713.pdfIn PDF document text
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/47687560842.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/83442010628.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/98912182541.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_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 10628 bytes
SHA-256: ee08c23e76c2533ca34f0cb2ac0fb2b1290aeaae7808199d474cce5aa95cb68b
font_01_sfnt_off00011ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE1 17236 bytes
SHA-256: fdeb44b6a84fb18986fd55ce5ad11e3f76b98c22963ada178c80bf087d9b7e36
font_02_sfnt_off00014bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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