Malicious PDF — malware analysis report

Static analysis result for SHA-256 1142870e3031068b…

MALICIOUS

PDF

70.3 KB Created: 2021-08-27 22:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7130a7125ab717abd27fbb2132123b0c SHA-1: 0550281f930650b1908f5a1213131e851ca4381d SHA-256: 1142870e3031068b3b6b3f2c405634ecdeef40f4ba435a764885b2645660b1ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a ClamAV signature and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised WordPress installations. The presence of multiple external URIs suggests an attempt to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9448

Heuristics 5

  • 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
  • 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=naked+attraction+gemma PDF link annotation
    • http://simonhoirup.dk/userfiles/file/gadekoxeboxupumudo.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087edf3206d1---zekev.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160ecb26455dc7---15706829249.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd9ed55355---doteriwisemabopenimovag.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/1686360728.pdfIn PDF document text
    • https://termoformat.md/img/files/rebirijaxokaxexuvuj.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/pogus.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/16966085916.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/5ed8f83a8cf03ff1ef65d2bbeeb9dfe4/42275686868.pdfIn PDF document text
    • http://www.moyekolodin.com/files/6394389896.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7g782a801p93l9pcdakghm6ll2/1210539263.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/qqb4ekqklulrojkatdjcspi1rj/30412402779.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/360c0e97c08f33b421a1ba877f890d97/60431599167.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607374e8e3b14---98386845947.pdfIn PDF document text
    • http://streetnn.ru/data/upload/ck/files/19581435986.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/jeguzirilow.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/sisowut.pdfIn PDF document text
    • http://vanillasky-ch.com/images/files/52699758698.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1c9c82cb4---55694659827.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/92a471f9388e5b013e4c9e26475c1b15/46998504434.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/lunepekifodetitu.pdfIn PDF document text
    • http://tndgdemo2.com/ckfinder/userfiles/files/bagapojamewuladux.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ba19c8d2b---12781285102.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/b27685e81591513088fbd7c4d5eddcff/54293577075.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/2d3df49c7cacdfc18c574193e3373b19/taxuvojusepu.pdfIn 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_off0000c362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC362 16252 bytes
SHA-256: 9d86e0d69671151d2761578b7a398e20375b978b3ddc4a0a69098bf6db877035
font_01_sfnt_off0000ed15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED15 10568 bytes
SHA-256: 0443beab51cb84807e4fb5f184b89ed743c181055827471dc778848bc9bcbb61
font_02_sfnt_off000104f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1