Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebaa31540463d809…

MALICIOUS

PDF

121.1 KB Created: 2021-09-09 05:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9ff01196c79d289ccda33cd03c1bf80c SHA-1: 65695263fdda827bae619cf0140a097ecfc2b047 SHA-256: ebaa31540463d809d3585968cf268d6f2fb35b63958d2d9d5969895b7f19daf2
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://burbank.kopanramen.com/uploads/files/jiwelimatobitaxebul.pdf In PDF document text
    • https://najlepsze-w-polsce.pl/uploads/95749587183.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/jetimizogikapumepeloxer.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161393f7574058---wijakiregawox.pdfIn PDF document text
    • http://elsped.hu/files/file/vikefik.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/pewezu.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/wegutatokujotuke.pdfIn PDF document text
    • http://df-foundry.net/d/files/83312497618.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210903150644.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/kodikevujukugodasetek.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/zazibefijuxowilazuku.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/tobuturitexi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e79c990d4c3d7515513fe7d6b512b1ca/81818030274.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/51693174800.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/27167a8ba6670d79542b48fffa56bb8c/52459107664.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210904_095911.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/bawoporu.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/62217468268.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210901135444.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/161340da2cf828---pifajodasowobepotepiko.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/22002222725.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/vubifateburu.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/161354ab11b4b6---kaxoxonakemo.pdfIn PDF document text
    • http://st03.it/userfiles/files/tukumugewej.pdfIn PDF document text
    • https://deepex.hu/hirek/files/90936993712.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/83300395344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=getting+texts+that+say+telegram+codePDF 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_off00016c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C4C 21236 bytes
SHA-256: 0e64d9cd408da6e6209d90cc7a9ebf58176a35e100f00b9355bc3eb783fade6f
font_01_sfnt_off0001a438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A438 11072 bytes
SHA-256: f71c216decdf02a4b4ebc754f14ab98647f83b230aefb0b8c6b416a640c7d4b2
font_02_sfnt_off0001bdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1