Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba25210f890fc56…

MALICIOUS

PDF

84.5 KB Created: 2021-09-13 10:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 68ba3a5a01e8f438117ad27df3011324 SHA-1: 1132470fea6ec98fec56021f29b64621a7e88187 SHA-256: 5ba25210f890fc56e2601085e60225bc59cd577d352d261b55695e80dce255eb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to what appears to be a link farm hosted on compromised or disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=filmywap+movie+download+2017 PDF link annotation
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/16365137239.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/20499151161.pdfIn PDF document text
    • https://dunaweb.co/bg_image/files/8498999255.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210912023048.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/kutasivas.pdfIn PDF document text
    • https://posaonakosovu.com/ckfinder/userfiles/files/woxuzi.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613688ec3712e---87703670641.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161380be1130f6---vikinu.pdfIn PDF document text
    • http://www.celso.org/download/kumukatis.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613934d8c6e4a---luvujebusixojijibix.pdfIn PDF document text
    • http://klemanpince.hu/files/file/25435979915.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109061449219027.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/76805187834.pdfIn PDF document text
    • http://wellgroup.cz/UserFiles/File/85666704257.pdfIn PDF document text
    • http://risme.vn/files/624290613.pdfIn PDF document text
    • https://femagnet.com/upload/edu/article/file/13370653893.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/11127129449.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210908_111937.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/aa53c7ba1b1af3bce47248e1fb5e4e12/69733753746.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210901_FD6DC9BF57DC29B8.pdfIn PDF document text
    • http://zeci.nl/im/image/51583520977.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/52114416685.pdfIn PDF document text
    • https://designsdubaiukfashion.com/userfiles/file/16301742927.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_off0000e444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 18064 bytes
SHA-256: eca1b230125dfb1759a1d7e2deb4ca708e06f4f76b59f20e38baa82fbeb87197
font_02_sfnt_off00012b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9A 10772 bytes
SHA-256: 569f302c612593c9a78e412a72cffa35ea70d089c7fe8fc9d511ffdae8db9e4e

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