Malicious PDF — malware analysis report

Static analysis result for SHA-256 10afa306ec08a8b2…

MALICIOUS

PDF

85.8 KB Created: 2021-06-26 23:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c469e995db0fdc9cf58e2320ebba6380 SHA-1: 5e1bae36c74f49bde358b60f8aa237db81d30c13 SHA-256: 10afa306ec08a8b26a040546257b57cedd9618d5c08b674805ce15580c6f6d58
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.tekkoo.net/images/library/File/21650582481.pdf In PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160787090efab1---xafajozadepipaged.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/59814452441.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/wizukaj.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/5692631683.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/33jonqvv4be31cgcvj7ghjo8lr/81886269840.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d29d209cf5a---47683298614.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/4437c45e35fad531072b5c31d1d89c13/vivixexibuvifurofomaga.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/87217714895.pdfIn PDF document text
    • https://implant-drill.com/userfiles/file/voxiso.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/b9fd80a5168dfaa4079e6fa689b72564/vejozefirulezunamiwizu.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cc64fa454ad---10350627023.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3acbe1c24---bubimabosa.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/tafunikowakokefoxip.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/99j1of179t9q0671o0igkicgi2/30828092522.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/tomewobuxege.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8b14c78818f86bc6a5587dda4aa4a64e/87652384898.pdfIn PDF document text
    • https://ilcaminodaugo.it/file/nosugibujibad.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/a11e1afdd0c610d32a8ec473673b2e63/57696344633.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/d60be2c9826e83410fb366aa6fc16b80/46059892147.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e1666e374---65580790668.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/rotorawuxilagop.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/42e2e26895875c8020640d15477b2e97/mozalapujomaginelexanim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=clean+shave+down+therePDF link annotation
    • https://lapdonline.org/file/57841598883.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_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 10436 bytes
SHA-256: 9ea3c333976649c3bb55e4600b7b2841287b3cce20a7a4caf1c19fa32ce721c5
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 17576 bytes
SHA-256: d208086c33d578c40cd7b8b1500affe96acbfd568454af4752c9f5fe0c0de7d6
font_02_sfnt_off0001321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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