Malicious PDF — malware analysis report

Static analysis result for SHA-256 d36c0898a88bc230…

MALICIOUS

PDF

105.0 KB Created: 2021-06-26 20:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e757d360c2b24696703e3fe7ee9ab9f SHA-1: 4289740d603fad78e88b541ac996f0ad3df66721 SHA-256: d36c0898a88bc2306fea8632952db9fbbe21348f31f9fd3a969107dd543e7c9e
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple links on disposable hosting and the use of 'utm_term' parameters suggest an attempt to manipulate search engine results and lure users.

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://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd8a6af8ca---75491751385.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bda9cf569---fisunapopemuwizop.pdf
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/m77hdggs81fhqu24koug2lo7vf/5231497667.pdf
    • http://vce34.ru/attachments/file/jofibikovi.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5dmhg26s2l1485sv5bor0j50h/zezokodufozelos.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/p88qf25p7v62kscg45p8s91e75/lavanurub.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/5qoqec547i1brgk808m2efogs4/savodezudizebogakopunoka.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87948e9fe6---34301425427.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/72a06e20b2517dd9a040c6da85730b47/pisedesuluwujuv.pdf
    • https://cristalensi.com/public/File/57702654101.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/2f587457291d85ab05e9c5468f6ce0ed/6227345458.pdf
    • http://tlxzkj.com/uploads/file/12182009927.pdf
    • http://anhuicrew.com/upload_fck/file/2021-4-30/20210430031031570442.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160bcfae78290e---bonuliw.pdf
    • http://spiregene.com/image/files/20210626_190321.pdf
    • http://files.ibiza-ferien.de/file/38402520758.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080b10f2ae24---29911685538.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/cf18f67fedb2daf312b5050379c0dc3f/53086056243.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf95926565---10259235028.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9e91158be---nurokid.pdf
    • http://bixenony.com/userfiles/files/27490602806.pdf
    • http://samafb.org/uploadfilefiles/1170573643.pdf
    • https://abofahed.com/userfiles/file/49151018914.pdf
    • https://organicfertilizerproduction.com/d/files/48449335269.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=watch+i+love+lucy+online+free+full+episodes
    • 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_off0001232e.bin
205767fa01649efcacb2f4de6cdd9bcbaa54c8eb2e221152e7898ab603df8956
pdf-font-stream PDF embedded font (sfnt) at offset 0x1232E 17544 bytes
font_01_sfnt_off00015092.bin
6a1218bc9ad23fac4a908bb7f30b8aca25c2f8f201e02b2e812719be63ac347b
pdf-font-stream PDF embedded font (sfnt) at offset 0x15092 5324 bytes
font_02_sfnt_off00016481.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16481 16792 bytes
font_03_sfnt_off00017c98.bin
e7e9f8517b6d71ac4dee77fe95fd2e2decf1c96d440e379c8b3df28e08e93d28
pdf-font-stream PDF embedded font (sfnt) at offset 0x17C98 10992 bytes