Malicious PDF — malware analysis report

Static analysis result for SHA-256 0136dc68dac00975…

MALICIOUS

PDF

89.2 KB Created: 2021-07-19 05:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a9951835b91a6549ecf5f2a45f8cf4e2 SHA-1: dcea98e02bdea706fc5bf2efe3e41467b3e54523 SHA-256: 0136dc68dac0097517ab87e95aa911df10b042823816c3af4f922fd8e4498f96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting it is used for phishing or malware distribution. The presence of numerous external URIs and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702d5e0ce5b---jakopuwow.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a390580a11e---vudim.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/ams5ce6o779tni7bp78qoroaq6/fakipevoxavawukadativenar.pdf
    • https://infrastone.com/userfiles/files/30468091849.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebf38b802e---30441200265.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/ugcr0qlf9b1seae7sfnbmdm2h3/fexavufifijuviriberigig.pdf
    • https://emmaushuis.org/pages/44633187567.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609325d8de0d3---sagafabimodaluduxugenudo.pdf
    • http://adabaskimerkezi.com/upload/file/gorufatekutububo.pdf
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b34620cbcec---vuxejezomoxobuwidoruvakog.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/750d27ea2e30e173e337090dae33e956/diluxedasome.pdf
    • http://tuanayapim.com/rsm/files/55504113553.pdf
    • http://rajhansnursery.com/userfiles/file/murifanabifojalatelex.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49b8eb1d3---35511790974.pdf
    • http://iltorg.ru/upload/file/wipafukovafex.pdf
    • http://www.teeintact.com/admin/fckeditor/editor/filemanager/connectors/php/img/file/sigivotupumuragamake.pdf
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/96967999b99d3498e9ad07bef7e59959/83867598992.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839a091bf08---sebavafo.pdf
    • http://olgapolyakova.com/files/files/tisutatovejuride.pdf
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160737bdab9edf---61298400839.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160ad4437dbcce---80730815820.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb44fadb42---rijusozonidavulilix.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/60047a2d02031e4fe4d3ae41fec8fa64/lewodejud.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/28c96481c24730648410d7c367773076/falureg.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/2085626375f5026b4f278a3d6f274c80/lomujujowimasuvuv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=converting+units+of+area+and+volume+worksheet
    • 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_off0000f281.bin
1686178220ad49a101515e7048b46fc10d5bf3810ffb01bbb58fdccd275f8b53
pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 19728 bytes
font_01_sfnt_off0001251c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1251C 16792 bytes
font_02_sfnt_off00013d33.bin
dacb44d2546c329258b5cf97c86fae2aa8cedbfe2378f43ae8a335c77c97f0ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D33 11176 bytes