Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc77d71000c4233…

MALICIOUS

PDF

91.7 KB Created: 2021-07-03 06:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 07cc8d9f203b5070f2d2e78cd22efaf7 SHA-1: 53935bb008bfab7141d8dc6a04df707cbbaa5002 SHA-256: 5dc77d71000c42334c208b0950849e6ef1123e301d48672bbcd338187d4c58ae
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm to distribute phishing content or further malware. The presence of external URIs and link farm characteristics indicates a likely attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

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=old+spot+pigs+for+sale+near+me PDF link annotation
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/1lh7n7b4g5rc60e5fd8s29q462/xogasawinuxifufi.pdfIn PDF document text
    • https://bataretak.com/img/files/file/44397453385.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160cee35ef3e4c---92320121993.pdfIn PDF document text
    • http://www.firengo.com/userfiles/files/37258788285.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/wusekozekal.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a338ba517bb---23984149009.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c86b871bf05---63011661939.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/35ca20ac1db049b6ea6842340b58b2e9/31515664527.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/25ee66aaaf180dd4544c9c9d87be9394/lemonopaxiwadumawenig.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/65664187447.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160711af5ab875---puzemofawatitebafisiv.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608586b11bd53---21160297081.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac6f18209---katixatuwavumevoxota.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c6a3565b7---86463164771.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/10bce908d7106ffcc9c185fc2bf78dc1/jafosuw.pdfIn PDF document text
    • http://artospace.com/pics/file/63806063454.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/64755444138.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/4e006bcda9a84227dd047236473479ef/75188556816.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab63e66c8e0---26939059813.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d415bf9c4---33696774875.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/zodapewovakej.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/bnja9l5btfl525qqa6jbf83m5j/42316278999.pdfIn PDF document text
    • https://groupunsur1.com/contents//files/37412183606.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/4f3104c51064a78e298b2b5ada0a3d82/komukakikox.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d3a84f7a964585c0c28aafa72af966aa/16920538352.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/92574598521.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF718 10864 bytes
SHA-256: e033c8e0ee8d3cdd2fa55c7f27cc206fdb3112cff1f8a31ad2af613ea067076a
font_01_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 18288 bytes
SHA-256: 0a047ba9a841183051adadfd75cf45991567fd54c28a6ff313947ff634c52576
font_02_sfnt_off00014052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14052 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001585f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1585F 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560

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