Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1883377501c603a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-04 08:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 51b631b00009dde6ced466d3ff846ad6 SHA-1: fae3d6579fd3a6452cec2c39e07ad53749eb766f SHA-256: b1883377501c603a3e970ed86100521e5524c582a8a8e308fcfd94096edb7b25
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 high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms. The presence of numerous URLs, many pointing to potentially disposable or compromised domains, strongly suggests a phishing or malware distribution campaign. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://ciaooo.ru/uploades/userfiles/file/jogapikewizexibe.pdf In PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/vasudibefonesanisupevez.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607585d696ec5---75107991366.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/71197087392.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cbcae2c96---69109138090.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/88ae146542ed1817e0281b72986d574e/walitawexapurevoke.pdfIn PDF document text
    • http://dyweisheng.com/uploadfile/file/2021072510472773499.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160b4253675e4c---filetuf.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba32b9a2c43---54995470756.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3aeab496b1---53918525111.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/29570997789.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/v7he6q08q933ts1gm5acflp7ej/27063233846.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/cae6b23ec5ce61512833179455e46a8b/negilupegaxadatezowirobo.pdfIn PDF document text
    • https://havadisname.com/upload/ckfinder/files/40406179470.pdfIn PDF document text
    • https://wecareprogram.org/images/file/39867728882.pdfIn PDF document text
    • https://lamaisonducoeur.ca/upload/editor/file/81257363911.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/lomiguzew.pdfIn PDF document text
    • https://rajakeempat.com/contents//files/95328941172.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712936738c5---furofamofikizoju.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084312d544c4---52082233735.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/73755663250.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/supesig.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ada4c968a59---10206658339.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/61326947974.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2f6fa62c1---50470685003.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=subtracting+integers+worksheet+with+answers+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 18680 bytes
SHA-256: 3f0c7342187627c48a32155aa8ef0c0c44e6d3866e13edd55e53d4a3aff5a02e
font_02_sfnt_off000123ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AE 11344 bytes
SHA-256: 4638483e28a09087505d2a2cdfbdaf994cefce58760994367a8a2278dacc15e8

Open this report in the interactive analyzer, or submit your own file for analysis.