Malicious PDF — malware analysis report

Static analysis result for SHA-256 56183fa0367abfbb…

MALICIOUS

PDF

101.3 KB Created: 2021-06-30 21:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6f70d7a715b81d33c01cb290a082ad6a SHA-1: 19abad7d5c78727637ca27a1bd21184e86210193 SHA-256: 56183fa0367abfbbcd02c144d74cae6e6c87966535454dfbdce0e4b9dad59c6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://hostingalani.com/calisma2/files/uploads/sokilawixegetoropojiwev.pdf
    • https://mintowncoffee.net/uploads/images/files/durekuporivo.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/58b65b5811f2663db6261dbf79743d22/30386879093.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bcb14b681---nefejagopekanidesibigudo.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b398c7ceaa6---zeboxapivaxipevuvo.pdf
    • http://soflocops.net/clients/81266/File/75613047765.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/55789830523.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bb2cdfe31---dewusipez.pdf
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/zerexivakotonun.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/c19a54505fae5f9fd6aaff5be44da083/37508655664.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/c923ddf9e0e8b99e0a41612118e3fa2f/91951663514.pdf
    • http://shinies.ru/img/lib/file/66722510630.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160837b10009cb---82407574153.pdf
    • http://usa-ex.com/xarolevimepufifexewiwamok.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/54981697846.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1aecff774869aa2e3904db0ffb7ba4a7/46769355073.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160871e0c5fd20---niwasezazusalozuwot.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b208a6a03225a93c36328c4b5e3bf0fd/wudukomasilenedixuno.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a24969013d0---95926665806.pdf
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/a0f074fe7385e59a4ff1daebf9456a27/83887576756.pdf
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/jiwigovekaniweguwifode.pdf
    • https://its-bulgaria.bg/files/file/pikedafip.pdf
    • https://namlongadc.vn/uploads/news/files/94479895103.pdf
    • https://hr-serdahel.hu/images/file/pubidixewek.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=god+of+abraham+you+are+the+god+of+covenant
    • 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_off00010c9f.bin
21caa59f04141a1b0887c821af6502f4cd9190816ddd30aa9f05ccace9fe8d10
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9F 11076 bytes
font_01_sfnt_off00012625.bin
fdf6de5fd6e3aa175daad2cc67c9e68265a118b74bbcfaf5913cbdf3140acb10
pdf-font-stream PDF embedded font (sfnt) at offset 0x12625 16844 bytes
font_02_sfnt_off00013e55.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E55 16792 bytes
font_03_sfnt_off00015667.bin
09e463d879570cda10a0bc707d8fb806aaf3b4838c2c86bc9f7fd67c1fedda35
pdf-font-stream PDF embedded font (sfnt) at offset 0x15667 18612 bytes