Malicious PDF — malware analysis report

Static analysis result for SHA-256 176a925168ed03a0…

MALICIOUS

PDF

86.4 KB Created: 2021-10-06 22:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9077d6b14cab49fc67b54e1187bd50ea SHA-1: d22e73304095cf93da3e983ecbda51df72ee467d SHA-256: 176a925168ed03a0f1c6e4fa2015bdc74c0aefd049bf48a10c88b3ba7129871e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to disposable hosting or compromised CMS uploads, suggesting a link farm used for phishing or redirecting users to malicious sites. The PDF structure and embedded content are consistent with techniques used to disguise malicious links and evade detection.

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 https://huntic.ru/uplcv?utm_term=introduction+to+3d+printing+pdf PDF link annotation
    • http://bud-drog.pl/userfiles/file/furobugiwijasa.pdfIn PDF document text
    • http://innersolutions-uk.com/file/35522990550.pdfIn PDF document text
    • http://stonebreaker.at/72297938783.pdfIn PDF document text
    • https://billionbosses.com/ckfinder/userfiles/files/feferimakujanefakosoxa.pdfIn PDF document text
    • http://bud-med.eu/userfiles/file/vogajewu.pdfIn PDF document text
    • http://theponghop.com/upload/files/litivugujejivawagepew.pdfIn PDF document text
    • http://kledingindex.nl/images/uploads/zikivalanewigebutipalamu.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145ca1058dc5---loteniludugivadokezot.pdfIn PDF document text
    • http://dylogistics.com/userData/board/file/pusofe.pdfIn PDF document text
    • http://esllearningbydesign.com/app/webroot/files/file/juvazazazalov.pdfIn PDF document text
    • http://koreaticketland.com/userfile/file/pomujidamelaxawa.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/tetixigurudikowadak.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/57355854181.pdfIn PDF document text
    • http://denkobarbell.com/_upload/files/44306946338.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/jumeniroruratexodubojoxe.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/96726214187.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/lejokikojotodusowi.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/pifawifulamizoso.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/69417217492.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16156028305e05---fepudurob.pdfIn PDF document text
    • http://japanbizkorea.com/userData/ebizro_board/file/83601584202.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141bb1e39488---9645066033.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/soneselurexadatezu.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/c1l7j8iosms0vp5nsi36kdgi5b/bekizi.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_off0000ebbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D1 18348 bytes
SHA-256: efb94900eb5da3eac70042e67d7b47de9d3634904c5c2adf15de7d8c79072a73
font_02_sfnt_off000133eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EB 10508 bytes
SHA-256: 11cb8c0b1c1e5f53d651dc241136dfd0dc9739a5dd884cdf18efdaae9cbd7c1e

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