Malicious PDF — malware analysis report

Static analysis result for SHA-256 302c1bbf417a63d8…

MALICIOUS

PDF

91.1 KB Created: 2021-07-21 16:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec0d91180359a98482c3b85d439b78c9 SHA-1: d64675100b3c19e68e556b1abadb109ec2dc6668 SHA-256: 302c1bbf417a63d8c67654b04a6a649152884507a31d5a44091b05befc2a5fec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The presence of a 'download button' heuristic further supports the idea that the document is designed to trick users into clicking links, potentially leading to further compromise or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/95588181df96e4383f193e6044ee5c46/49512689152.pdf
    • https://edu-mate.kr/_UploadFile/Images/file/22019966563.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/19qh6e6hutvt0am729ic8041l2/9443674105.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5dd5ea14def7a9a2a755ee25795f1462/12921491222.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ead0c8dfb7---sigemufefazaxibowisiw.pdf
    • http://hphs1958reunion.com/clients/47465/File/64484382576.pdf
    • http://tvkinter.com/file_media/file_image/file/kokodepif.pdf
    • https://perfecthospital.org/FCKeditor/file/xazivaler.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/aoegsfek4v07rvv9g5v6co6d77/11882341767.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734c5337d33---79606783065.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4e25e714f---45313759089.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a916a809f46---76902112058.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/88940706721.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fc9d68882---simufakamewofo.pdf
    • https://tiguan-wiki.ru/file/dewagebatelafek.pdf
    • http://baiduvpn.com/upload/files/24403240658.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca07be38237---80468732302.pdf
    • http://cn-noah.com/uploadfile/file/divobejimasafuwavonaxu.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vjnnvkm85vn0cq8ag6k8n46mem/lirirolevage.pdf
    • http://nrnchina.com/test/images/ckfinder/files/13038375418.pdf
    • http://qataminational.com/uploaded_files/userfiles/files/390076894.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=cleric+5e+character+sheet
    • 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_off00010210.bin
4f7c04e00d3e6dbcf72d37898fffdd0d52b9386ca8c11f77d9d673ad94180209
pdf-font-stream PDF embedded font (sfnt) at offset 0x10210 10268 bytes
font_01_sfnt_off00011958.bin
930ba4666e111662980f296fd449e0e2f59bd548b1804074d1d90636bc10fbb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 17364 bytes
font_02_sfnt_off000146f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x146F5 16792 bytes