Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad49f2da4e86845…

MALICIOUS

PDF

78.8 KB Created: 2021-08-22 07:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dbce28a70c9572f142893929837c973a SHA-1: a01b77f7ef96d21d7bde94afd4e89ecf228336cc SHA-256: 1ad49f2da4e86845139fa9dbb86c5781f5e2a298c03ed2ec6a7b29cf8660116c
156 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. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting. While no scripts were directly extracted, the presence of numerous external URIs suggests an attempt to redirect users to potentially malicious content or phishing sites, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077235b5b847---78703587198.pdf In PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/jutiwafapuzenagabuto.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/gexolewu.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb9048c62f---ruperevavelozufa.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16080080bd99a9---pemalivisu.pdfIn PDF document text
    • https://polandpools.com/contents//files/senisaxevijeb.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/45718416091.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210719035543132.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a71371272d---xizejezitufirofevuzu.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607163124dde7---7937127908.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9c4ab514---dabagufe.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160857b684f63a---81276193463.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1610499124570f---10563079029.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/xibijukalewiwavowowinim.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/vukufeferekakefa.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3536c73a---murepazufijopotat.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c26679ef82---vubiwonelebujaxomo.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/wawalodawovobawolif.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/xulizefagug.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/3cb1ae5a94c9011c67cdfa615b407a05/pulepolevofaxafadu.pdfIn PDF document text
    • http://demirlermetal.com/resimler/files/xikivobudezebanubo.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/3c4932cc38ddc5a7b66a55dafe92cac9/wejobebejiborapipima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=pogil+answer+key+biologyPDF 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_off0000d106.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD106 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 10620 bytes
SHA-256: f7a0a8cf6edd8c3a84674b4e56a53ef03e5bef354d4c5e074a05cadf53d06fc9
font_02_sfnt_off00010194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10194 17212 bytes
SHA-256: f4ab2d549a4e71e013d72761a9e9a305411ab0d4323ce22953f003b722d5f7b1

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