Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e70b09ef8b8347…

MALICIOUS

PDF

85.1 KB Created: 2021-07-09 05:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 768c0400f70f22320e83736fa80ebca1 SHA-1: 63461bc806cefe7d75a8cbd191f7928f7bb08419 SHA-256: e1e70b09ef8b8347f38ae0540004d3ab7a559f1cee9ecc1656dc8b123a89996c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm. The primary goal appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/9888c211a034a21ff4050753435f501a/84449928454.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/28ac1b02359c5dc830eb17d6523c8c13/37285786921.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fdd6aba03d45948bbf808cc80f7ccae4/79748187487.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/n6esfkleonri09o8ufdqpmtt53/lenubitizukonodabel.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/58cqkh1b79qahm7c30sln1f423/27717943443.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/753a8f35a9d54b24673419026dede8ad/nesesikapizonotanuxumu.pdf
    • https://emilline.dk/ckfinder/userfiles/files/55450803373.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/655lnnj9hpcpe9tns70cdbtolv/84380350965.pdf
    • https://ludifrance.fr/userfiles/file/99461319358.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/p0u340heig6301e1ks39qr3vi0/28332931892.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/ecfb8b4a38c6daa895f138517dff2e9f/31996387901.pdf
    • http://fsgpj.com/upfolder/e/files/20210620112853.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/5e905d9ff434cd5089697058ac1027b5/31411811643.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5hljekhqf1kbolis7gpd9bl1v4/fubupijowugokinazopowili.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c2765dd99---43910085231.pdf
    • http://bet-balance.com/userfiles/file/70835749971.pdf
    • https://artasedanasingaraja.com/uploadfck/file/dajix.pdf
    • https://georeno.ca/userfiles/files/juwegevedisuzaz.pdf
    • http://nfrostov.ru/upload/files/jakofafazidoxili.pdf
    • https://fenixfalt.com/userfiles/file/xelasavitinejagexo.pdf
    • http://olgapolyakova.com/files/files/65912886145.pdf
    • https://hotelmitrutarija.com/uploaded/files/61060093169.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c3aa97c7---ginamapopowutodogelerul.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/2qh22dttr45p0g82boh5gnn2ao/larinixog.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=agatha+and+poirot+partners+in+crime
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d437.bin
df0296a54c0f412167878d532672ea404431c5d7fee4c4494877ee51061b8d0f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD437 10896 bytes
font_01_sfnt_off0000ed12.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 16792 bytes
font_02_sfnt_off00010523.bin
97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x10523 16192 bytes
font_03_sfnt_off00011aab.bin
320238f6769247dec1b6987752c68d58075e6135395368c1b1dfc30d5ac601a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAB 16812 bytes