Malicious PDF — malware analysis report

Static analysis result for SHA-256 be0e718cbb56a382…

MALICIOUS

PDF

85.1 KB Created: 2021-06-28 22:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f14b410c66ea69fad5512514e21a428 SHA-1: 27d3efc1f8323e96074c4425ebc46e19b55d0293 SHA-256: be0e718cbb56a382ccc178baefe7044395c8a51d92dc4d03df064cbd7b764a1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to various domains, many of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://smidgel.ru/uplcv?utm_term=darkened+areola+during+pregnancy
    • https://mallncart.com/userfiles/files/mebojusifiragenif.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/fb01e7ac519a2b2bce9cd83ba0bd6e21/wivezipafojir.pdf
    • http://gleneaglehoa.org/images/file/nujuzawigamuluxitopiju.pdf
    • http://urgentcarepb.net/userfiles/file/jumadixotovut.pdf
    • https://porterbrothersltd.com/app/webroot/uploads/14531546241.pdf
    • https://anukulagrotech.com/userfiles/file/94812023960.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ee56857d5---jarawaxubatodirotuxererox.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893eefa398f---56231538780.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/emmhpgnna2ff84pdut93hapqca/38752565503.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0gpq70nvrgcoia3a5ud2648mn5/zarisigo.pdf
    • http://jamesirvinewedding.com/clients/f/f9/f947a18657f5d77a8fcd192ffd4ccf25/File/37613074047.pdf
    • https://raljob.com/userfiles/file/dexenop.pdf
    • https://pet-fashion.ro/mm/file/82543406789.pdf
    • http://interreg-ipa-husrb.com/downloads/2172074573.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f43f6d694---57659476060.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/fdnh5rrgpidi9182a244emmtk5/golekalu.pdf
    • http://elyriacatholic1970.com/clients/7/79/79c6984f8945646ae1b55d50a6b4dbab/File/jasogunirizivasolu.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/a86d3c85197a86c1fa067abe220bf2e2/temizajokiboduxax.pdf
    • http://www.look4job.gr/images/_user_na/file/vurujulukena.pdf
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/73868098023.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/0b1b624bfcc5ab8f4275d3cf4b5cc19d/7646382860.pdf
    • http://ztkammer.at/uploads/file/kiwakurelerub.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa42a20c43---gepibe.pdf
    • http://peoriamayorprayerevent.com/clients/1/16/166e3f524b51ec168ebfd48f86188a1d/File/fetafumamaweledetuxezuko.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e937.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE937 16792 bytes
font_01_sfnt_off00010149.bin
cb0124f37263df99af1667de16ac32eff56f048c0f627e1e4d35b45666114bc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x10149 18176 bytes
font_02_sfnt_off00012ed0.bin
35f4eec9934a56a99c50c844b6f0a5d82f391817d38708a8a468fe4d8ae7f5b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED0 10728 bytes