Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0556d7ca4f3f9cc…

MALICIOUS

PDF

81.7 KB Created: 2021-09-05 12:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fd27a8104315f1b6ca88a8d4163034fd SHA-1: fe90bc6a6f4ccc359634ba44c8ae53ca8943f336 SHA-256: f0556d7ca4f3f9cc4fe6283179c5a63278e107fcb864aa0b5bd180b1cd6192a7
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. This pattern is commonly used to distribute phishing content or redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://brs.jo/userfiles/files/69415316826.pdf In PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/xasulava.pdfIn PDF document text
    • http://personal.sut.ac.th/chantira/port/ckfinder/userfiles//files/zasuzuxoxosepatiletud.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c37961254---rudizaforepubawalugu.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/26574152391.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/zepodepakakudagujoven.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/beronopaf.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7af17d31f---61609541520.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/a0c32t00tcicil351av8jfrk3p/gudesetodukev.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/jupalunu.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/7f7f92972b2431b5322d1be13f3b0572/77929734399.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d967e5d376b---muwigikobevupa.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/27f6colv2990dsnk1bsh3i8kc5/77326793366.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/waxemulinamagumalef.pdfIn PDF document text
    • https://jetaime-shop.com/files/55434224470.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/denizaf.pdfIn PDF document text
    • http://mxag.com/upload/browse/file/bomojigud.pdfIn PDF document text
    • http://nova-auto.com/upload/gufabutaj.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/266bdf949637cc36b800a13772f88a08/jifelaxemab.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/ecfvt5iqdaeb6g535t810sqhjd/76379184289.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/49409523653.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=declarative+interrogative+imperative+exclamatory+sentences+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_off0000d71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71D 11244 bytes
SHA-256: f8e521c122d88a75eaf4f954dcc744c362ba1d7db88c6d623d5fd62479f005bc
font_01_sfnt_off0000f14e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14E 18608 bytes
SHA-256: 8ea5054fe46a5e348186b8fffa30f4fbb9815873ece0745849fe4b937555cf82
font_02_sfnt_off00012087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12087 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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