Malicious PDF — malware analysis report

Static analysis result for SHA-256 16bf4567bdb0bf05…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 00:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 47eea363232293ccc4ce8c717fecdf1b SHA-1: 311080d45fd4e7187e3b9d400c7aa8e9c76bf440 SHA-256: 16bf4567bdb0bf059c054b3849e658270ad164bd35649471a7f719d140c0a305
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous links pointing to various domains, many of which appear to be compromised CMS uploads, indicates a link farm designed to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16075ca11ceda9---vofijeruvawiximif.pdf In PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/813431169155bd0a6b6a2c74e2626bd7/94549169749.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/vaximumoxefuxofimu.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/60512934603.pdfIn PDF document text
    • http://aminotp.com/upload/files/kitonebom.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/rezipofijepakol.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/62941862544.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/2d6c877cea8bf8a47884ff94c9461c5e/japaretubaguketaripete.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/xenitemanogupefijoleg.pdfIn PDF document text
    • http://miet-boot.ch/images/uploadedimages/file/xetopetite.pdfIn PDF document text
    • http://whatdwellswithin.com/file/tofodimunolazizolubefotu.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/69075094761.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076523dd04c8---vovoxolufudajegus.pdfIn PDF document text
    • http://ancheng-medical.com//uploadfile/files/jonezukedak.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/44581329954.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913685259e3---22491796018.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a04562691---vijenujovop.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d986f7123e---18273768279.pdfIn PDF document text
    • http://laiyi-art.com/userfiles/file/nupapugexokupok.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/35462596257.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607610b5c5e8b---suxaves.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf0839adbb6---zisififoviv.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/3qdvrsn60dl97fk8rcp3hc6np2/11932308589.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=the+american+pageant+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 10696 bytes
SHA-256: 33db9b6678272707dc1157f0861165cdaf880cb6e571ac772bb6ae334492ed6d
font_01_sfnt_off0000efac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107BE 18244 bytes
SHA-256: ca1003d4a40521d9b497d0c7c5e026132ee92556e78f7e29822a90f82e88757e

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