Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae53fdebe35aef4…

MALICIOUS

PDF

94.4 KB Created: 2021-07-02 07:34:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c51fd83aeb4ac9b55d60b394f15dd305 SHA-1: e8d24cd30c1e303ee9fed0a0c03045eee25ef64a SHA-256: fae53fdebe35aef49de15881db9307cfea646ea3cf36c7e6536f1b2b9a56ede7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://kraftyz.in/ckfinder/userfiles/files/gerutabedujov.pdf
    • http://bakoca.hu/files/file/40231074851.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f63951e735---juxisugonetumebidur.pdf
    • http://rszm88.com/upfolder/e/files/20210531043125.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mogona.pdf
    • https://aravlicraft.com/cmsCart//upload/file/36220265721.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091bb701fb2b---78719761933.pdf
    • http://ekolojikweb.net/upld/userfiles/file/59220185286.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/1198a4c3e04bdd082b092afaf757aad6/vitaxoturibisebemuzal.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b6284b82bdf---pifiwulazosewabodege.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceddb272a1---puxegadolobefubukelovu.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608762b5d05f1---ripufegujutisub.pdf
    • https://canevastoilestjean.com/upload/editor/file/52961755634.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/7h7lg2nme6p8avff9g6q9jeqa6/mojavajibi.pdf
    • http://jpmoto.biz/upload_picture/vunigogegezafub.pdf
    • http://fitviewer.biz/files/file/74826178760.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607248e81608d---61123670422.pdf
    • https://zlatartopalovic.rs//files/divuvakesugawedugew.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/4hp2iri2n18i48lgpa7jalb854/volemanawoluda.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab99d2f7c8---18134519226.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/diwerezalubujavinumasodof.pdf
    • http://cerezolorente.com/files/cerezolorente/_repo/file/72786529873.pdf
    • http://northcity.rs/slike/files/ritabawigosu.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/b15b061173d3621a6cdc3dac4cbb78db/86213791539.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=list+of+parables+and+their+meanings+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_off00010b01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B01 16792 bytes
font_01_sfnt_off00012313.bin
2bc98a33e972b912fe8d89cc5cab2823fba0529cedc97cddcbbd97001194beb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x12313 18436 bytes
font_02_sfnt_off00015354.bin
4f75a28459f883dfed50709de6e453585e7c64a10e867bf949e3cba42429d905
pdf-font-stream PDF embedded font (sfnt) at offset 0x15354 11040 bytes