Malicious PDF — malware analysis report

Static analysis result for SHA-256 97319d47d50bf0fc…

MALICIOUS

PDF

88.3 KB Created: 2021-09-01 19:59:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 184c8a67d77d9457a420d53a28f214c5 SHA-1: 81bf9ccc957d8747914b874cea7da9475918c755 SHA-256: 97319d47d50bf0fc9da58df1517ed99e3a1af1688f9d8a580fc81ebf9842eade
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=can+rice+make+you+gain+weight PDF link annotation
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/hcq4h4dkg0p07ltv9hmv5acia8/wefakogexovitora.pdfIn PDF document text
    • http://usateatop.com/_upload/files/78457578825.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/bezuvakizixiduril.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1611b23dece417---tinivudobinosasit.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c552c668fc---begonadivifaburexej.pdfIn PDF document text
    • https://biocoop.legreniervert.fr/ckfinder/userfiles/files/38065726434.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/17fa50e0653b9130be3b3e963b7da2d8/35563727689.pdfIn PDF document text
    • https://fereshtegan.net/basefile/fereshtegannet/files/padobagemutumifed.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///68932712414.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/49779512740.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/10320752257.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/2oej25jpfj6tfim5lu93tirnrl/bugawevagiku.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/movofafagi.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/sosemutepawigulurub.pdfIn PDF document text
    • https://fotokeramika.bg/userfiles/file/gokuxifomogumariwetedagal.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607940ea80bd5---51710762333.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/sunabikatexilewasiram.pdfIn PDF document text
    • https://ckmandarin.com/uploads/33032906904.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612cf32350bdb---60204140489.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/wapakulivixemogajusex.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/97692115647.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/2679564913.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/95076062287.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/42965880210.pdfIn PDF document text
    • https://abctranslink.com/ckfinder/userfiles/files/keximelatizewupepo.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/34613093069.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_off0000f08a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08A 10888 bytes
SHA-256: 66fc6dd707a73427dcafb8f835a27ad31ec05105f5333ebb99cc58ff32df4fe4
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 18804 bytes
SHA-256: 8dab76b52439ac0511fbf15282ed07304871948adcc6bec06fa03f7573d71847
font_02_sfnt_off000139ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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