Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f02fe4bdc747d2…

MALICIOUS

PDF

69.3 KB Created: 2021-09-28 08:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fe8da1ca96ca5b40886bf280eeeaef7e SHA-1: 160f5a434e0f0dbc13a99c3277512051dc2cf0d0 SHA-256: d5f02fe4bdc747d2673dd08b97a14b6688701dac64b18be806a480d722442e7f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. It contains numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://cn-daomeng.com/upload/userfiles/files/8cf9769e508c075a2ac588c30f341273.pdf In PDF document text
    • http://tarnava.eu/user_images/file/texuw.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161378da34b168---barolofoxikozawunabi.pdfIn PDF document text
    • https://delphin-bau.com/ckfinder/upload/files/60732339093.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/79399768100.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/2fm3m8k071t0o5if7njmksps74/33974395278.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/56672381265.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/fugos.pdfIn PDF document text
    • https://natatourism.com/userfiles/files/tepinuvuzezikam.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/gozamiweput.pdfIn PDF document text
    • https://xedulichhaiphong.vn/images/news/files/tedanoxodaranafit.pdfIn PDF document text
    • https://558com.vegner.com/userfiles/files/20210920_082527.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140e815a8404---47247123704.pdfIn PDF document text
    • http://lesen-und-schenken.de/userfiles/files/ruwulonajezufage.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/pikubetilabug.pdfIn PDF document text
    • http://amidoux-peintures.com/ckfinder/userfiles/files/vekejufu.pdfIn PDF document text
    • http://ing-ka.com/user_img/file/77452278328.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/79693864849.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/39746921635.pdfIn PDF document text
    • http://tandartsindex.nl/images/uploads/fogolakarajutojakimepi.pdfIn PDF document text
    • http://isisthailand.org/file_media/file_image/file/74002366830.pdfIn PDF document text
    • http://africalegal.nl/userfiles/file/wimapogatidinuvumale.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/9abh97aa4vf5sctet7sq0ebdd1/84095265017.pdfIn PDF document text
    • https://ist-lb1.istanajp.com/contents/files/3184243484.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=transferring+pics+from+android+to+iphonePDF 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_off0000af8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF8F 15640 bytes
SHA-256: f276aedb34642724ba5f3cc1797c7cd2af499a57ad19b514f3952be224d9588c
font_01_sfnt_off0000d6a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 10984 bytes
SHA-256: 4af0b0fbb99dcffbc3803dda974454894506df968d3e195b5ceeb3085d8a2ccf

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