Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbda2096912ec1c…

MALICIOUS

PDF

72.7 KB Created: 2021-09-09 07:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8cbb7afc90a3a4d4421d08f09d42c264 SHA-1: bc077f346ea87aaecd6470c8f7576e02dff5fbc8 SHA-256: 2bbda2096912ec1cb2216e8ff000d1d42416adcb723123830ff676004769b9c3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains multiple external URLs, some pointing to compromised WordPress sites, and a visual download button. The PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely for phishing or to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dream+league+soccer+2019+mod+apk+obb+download
    • https://congchungnguyenlieu.vnpec.xyz/uploads/files/sosiluludakegiguxije.pdf
    • http://top-caster.com/userfiles/file/latala.pdf
    • http://kengosushionlineorder.com/uploads/files/jufenuwuke.pdf
    • http://alemotta.com/resources/original/file/simodadafilosaro.pdf
    • https://learningsolution.ca/userfiles/files/xisugopajedafenep.pdf
    • http://universalgroupautos.com/files/others/28162777976.pdf
    • https://sadhankendra.org/erc/media/litemorege.pdf
    • http://ux-school.ru/files/files/fevepusudipolute.pdf
    • https://www.disbel.es/ckfinder/userfiles/files/vuzuragaveninafewiwov.pdf
    • https://servingltda.com/userfiles/file/93280494974.pdf
    • http://yanartextil.com/firma/files/13039006151.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/2769414ff67ccacff3cb1faefac2fd73/mixigixen.pdf
    • http://jumpinfit.it/userfiles/files/5529022327.pdf
    • http://fishtech.org/uploads/userfiles/file/file/66166076766.pdf
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/72d87944b0e18b77b1581d1980eb830f/dodowavebadome.pdf
    • https://optical-axis.com/uploads/files/202109082348106715.pdf
    • https://bunianco.com/other_files/File/lukonulawoliwomobozavato.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161396df80d463---81982850342.pdf
    • https://bccphil.paramedix.biz/uploadfiles/file/56948742285.pdf
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/wufekibogixulotuf.pdf
    • http://millionsdiscount.com/mo_images/files/tubikodaxapefoxenu.pdf
    • https://akproauto.net/nbloom/fckuploads/file/35306436039.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_off0000b657.bin
09b80a260c19a91ef95fd7a44d76b134b0467d5dbf4d333935d501be95091f78
pdf-font-stream PDF embedded font (sfnt) at offset 0xB657 11548 bytes
font_01_sfnt_off0000d173.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD173 16792 bytes
font_02_sfnt_off0000e985.bin
4d03f91ae9c07795bc463c655362822f5f6ea85eab8de0eca13def8b3d393409
pdf-font-stream PDF embedded font (sfnt) at offset 0xE985 17024 bytes