Malicious PDF — malware analysis report

Static analysis result for SHA-256 8549bb895f48cee0…

MALICIOUS

PDF

88.4 KB Created: 2021-08-01 14:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6b2cfc40f238ed6ad92c404e6ce9b57d SHA-1: 68fac0119906891b6f8303880dae8aeb7d7fadac SHA-256: 8549bb895f48cee0755f0713ff1fb59a277e8271bb4ba39d619eff73bedb0ffd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to compromised websites or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure align with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://crysiq.ru/uplcv?utm_term=bhag+milkha+bhag+songs+mp3+free+download+songs.pk PDF link annotation
    • http://traiteur-ribot.fr/userfiles/file/xojejejoxewufefa.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/c03d28af2be2a7a102c027d315f2557d/27699248065.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/45132045546.pdfIn PDF document text
    • http://daydreamspin.com/userfiles/file/39143559857.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/beroni.pdfIn PDF document text
    • https://songhong.info/userfiles/file/12468485078.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/584b6c85d1e7465b2127e61a6440b14b/43867830672.pdfIn PDF document text
    • http://ifa-astrologie.de/userfiles/file/57449991136.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed359c0072---56099296854.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee90c9c50---lujebosovevaweroratode.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/kuliseluwisowi.pdfIn PDF document text
    • http://lakes77.com/clients/47041/File/jarokulof.pdfIn PDF document text
    • https://xanbiente.de/userfiles/file/42787488903.pdfIn PDF document text
    • https://dgaspcsm.ro/ckfinder/userfiles/files/71924358952.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/12595692840.pdfIn PDF document text
    • http://quaint-house.com/kixojirejijizube.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/59459123312.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0e877602f---zuwixidemenunenugulubi.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9128195ce5---lusagejen.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/8u99bfmneafagjolc46i0fv977/17997933663.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-19/20210519070040183007.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/p8k6jjuftj3qk102epeaimh9gg/zuxoxuwifezalomezurejeg.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_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 17444 bytes
SHA-256: 08876d74101467b39bc91e66b8b63082cbbdb9be2933d7addecabf4addbaa17d
font_01_sfnt_off00011deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEB 11456 bytes
SHA-256: f9f0d4d17bab57a80408363543e63a1bab0dd75747634c4ee649806cbab9dd96
font_02_sfnt_off0001386c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1386C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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