Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ae2f3368ac1b716…

MALICIOUS

PDF

70.3 KB Created: 2021-09-18 16:29:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92f9277beea24661db8390ebc5c70f14 SHA-1: a2bcd35005453b82c57c99cf60a997be9daaa459 SHA-256: 1ae2f3368ac1b71602d8c5d4322ffd3ce62071bf0d779866ab5690c750906579
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful sites. The PDF structure and embedded URLs point towards a phishing or malware distribution campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://nomylo.ru/uplcv?utm_term=lost+jungle+temple+run+2+download PDF link annotation
    • http://quantri.thaisonpalacehotel.com/upload/files/79893752834.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/loridawefadevuretesat.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/23838067166.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/tibiminowesav.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/90147866241.pdfIn PDF document text
    • http://hmconcretemixingplant.ru/d/files/naxigu.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/puburudumu.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613fff21112f3---titobajeg.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/35748827589.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/mowufugadiwesupelok.pdfIn PDF document text
    • http://kiemdinhcan.com/Images_upload/files/35131139396.pdfIn PDF document text
    • https://kolegium.inaheart.org/upload/files/34390849682.pdfIn PDF document text
    • https://cartolmania.it/file/bubezazapevekizizuweto.pdfIn PDF document text
    • http://bukvoznaika.ru/ckfinder/userfiles/files/faratujuvomugimigu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16140e9c357675---xotivupifig.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/98427018866.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/24150568841.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/fatevigemerutod.pdfIn PDF document text
    • http://findusafranchise.com/files/files/pejedisit.pdfIn PDF document text
    • https://limsurempat.com/contents/files/biwedagenojow.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/tomadixojotakeditaru.pdfIn PDF document text
    • https://icnj.net/ckeditor/ckfinder/userfiles/files/31218547181.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/30840779531.pdfIn PDF document text
    • 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_off0000b221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB221 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA33 15648 bytes
SHA-256: eef9b5d7fe7becdf9d01665042849255397ab29068cfe4c6e859323efa3f8d7c
font_02_sfnt_off0000f1ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AB 11036 bytes
SHA-256: e6939c7a2f98ac63f0f1e991846b0071a6ff9cb0120eb3c7793f3a4d04aec262

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