Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada4c034f48fb2bb…

MALICIOUS

PDF

83.6 KB Created: 2021-07-30 23:58:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a942d5256781b55987a1a4791e4ff5fc SHA-1: 1b893e93aee257973f733a0fb79fe3eca645ec94 SHA-256: ada4c034f48fb2bb3d3765a093f94131434da5f6ebd5e56a3538778d5b10abf5
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics strongly suggests an attempt to lure users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://ketchas.ru/uplcv?utm_term=business+and+professional+communication+3rd+edition+pdf PDF link annotation
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdea52783a---mijajuwabi.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/lokerewukixom.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/933acc148a0e48caedf82633fd40560a/bokivexevad.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ba923c5ed07---dizix.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/fokubufasakagesoxafexi.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/xirererarisinonebekal.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/5738349221.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/a447232abc15ba17854244203beedc0d/21694672127.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ef40966f---bomikaburezesalomegup.pdfIn PDF document text
    • https://charterfori.ir/basefile/charterforiir/files/69926309883.pdfIn PDF document text
    • http://womensmentalhealthmd.com/clients/9/9a/9a9ccad1be43d50cbc9928f06550b956/File/damosuzikuseruda.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/bosupifebax.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4428e5721---69008320582.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/84412712363.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/51183373250.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b6ec8ec44fc---tekakik.pdfIn PDF document text
    • https://panama4d.com/contents//files/kuzukunaw.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/tc85roeeq0vu505q73cls3spks/luganeradopowelugopidabi.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/xubevebugesus.pdfIn PDF document text
    • http://sdds.be/userfiles/file/12640162624.pdfIn PDF document text
    • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/juwema.pdfIn PDF document text
    • http://businesslegalgroup.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/garonudawesigoruju.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/62041416093.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa658785368---13363434125.pdfIn PDF document text
    • http://thainightjob.com/ckfinder/userfiles/files/saxidikow.pdfIn PDF document text
    • 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_off0000dedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDC 17716 bytes
SHA-256: b50ec9d460a00026e5fe01aa71b50e4730d804de689166a1d4cdf67ea77e8d47
font_01_sfnt_off00010d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001259f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1259F 11104 bytes
SHA-256: 11a61ec1a1e11ab89f59c74f61ea75b18541017e0dadd1d4d48def6bd96ea10c

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