Malicious PDF — malware analysis report

Static analysis result for SHA-256 05e1caaedd11a4c8…

MALICIOUS

PDF

115.0 KB Created: 2021-06-26 00:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e227ef85d6a98b82e563db8def2f9e58 SHA-1: 5c960f941b80a4ede52eaff47c41a58d0d92d3d5 SHA-256: 05e1caaedd11a4c8e7539be01bb428167c510dbc1d5211f018a0e2912da4d5f8
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of these links and the nature of the hosting indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160a52754360f3---46019353957.pdf In PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/lipupegurokedu.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210524/210524201612481695yui4sg4w5ome.pdfIn PDF document text
    • https://tidurmalam.com/contents//files/56597773688.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/92264858896.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/0uvoi5qcl0bt3rhpfht8m3s8j3/31046180606.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/80138698278.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e4aa4ca6b---zokonupoxuxosem.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/b9c28e34b732a116df78d091885f5e1a/25820825627.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/7013770f500fe400aea1a1f07099840b/zasaxuvoniluxobafumugox.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f51e9ce7e9---gokejuxiwo.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/4224eppe1p204ro4gu91ptagh3/zusupenemivafarotel.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jot5rgtmh991vro2oue2b2sek/segapuwojajujazoxobi.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/76238033212.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d610144354---60591340134.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/21b783e70ff6cdfbce0d6de8601fab26/40766369229.pdfIn PDF document text
    • https://blindnow.com/userfiles/file/rakifugisubebodewala.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ea6ea5119---98764045743.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/6b2ca43b955146f2ba906e5c4895845f/33426248230.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c0a3e6396---luwapus.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/7b98f07339a120c67ec8943909550cdf/zapajitajobaza.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/81543746407.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e7a241bd2---78420273599.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc474c77e3a---19757912440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=road+ready+drivingPDF 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_off00015f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017724.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17724 17876 bytes
SHA-256: 38e0738fe446a172a2c0675d2496978b373b48257598a9abea0b7921ab26df6d
font_02_sfnt_off0001a645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A645 10336 bytes
SHA-256: c1be47488e6acc272052dd26c1b25f038eaae96aaace87468778ab864d37923a

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