Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb1bd61a9767978…

MALICIOUS

PDF

71.6 KB Created: 2021-10-02 21:07:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 6ca8e88ef86860791ae8f0cbfe979831 SHA-1: bede1d6be3274d836832338e0f93eb8437995c2e SHA-256: feb1bd61a9767978dd071b070ebfaa5a53bb8142227af3cc5a4afa9f30816cc0
134 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains and appear to form a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting the user to one of the listed malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hindel-relax.ch/ckfinder/userfiles/files/zokododetuzidopobagaroga.pdf In PDF document text
    • http://abw10thstreetne.com/uploads/files/28845389947.pdfIn PDF document text
    • http://moto-bike.pl/userfiles/file/70868628919.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/17651101736.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/tuzuzetetemakejosokame.pdfIn PDF document text
    • https://taxinamdinh.com/data/dulieu/files/74162516663.pdfIn PDF document text
    • http://suaups.net/userfiles/file/vuwisawimawutelamok.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138354abd043---97581056404.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/zijupepixolevuvalub.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/56274864820.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/42438610445.pdfIn PDF document text
    • http://holzbau-napetschnig.at/27908403284.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/bosudoxe.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/tapaporiva.pdfIn PDF document text
    • http://palmdale.thepokeluau.com/uploads/files/7861239345.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/darudomubigebidiwaf.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613dad8e885ae---67474624196.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/kizamigamiger.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/2021929912377433.pdfIn PDF document text
    • https://hgb.se/filer/file/nafavepijowefowimu.pdfIn PDF document text
    • http://food-cloud.com/home/food-cloud/www/site/site/data/files/zibaxenaronubovexubulif.pdfIn PDF document text
    • https://resicolor.com/upload/files/25348638527.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/60132245711.pdfIn PDF document text
    • http://anchor-m.com/js/upload/files/21013977840.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=fellowship+of+the+ring+extended+scenesPDF 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_off0000b202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA19 10900 bytes
SHA-256: a23ab2bd08fa885bfb7410757ac6e9f41571368fe40b92c3caa6ed82485f626b
font_02_sfnt_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 17780 bytes
SHA-256: 3c5c02da4512c4245de3f269d280cf5a7e79fe9637ced0bc98fca41640c179a8