Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae8340ca2a88788…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 14:32:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d01c2639f0ff465935197cee7627baeb SHA-1: 402c3d33a876e3fa4cfcfb239cf117087915c2aa SHA-256: aae8340ca2a88788b1d6f2798ad8c6e48a9c09735274678ae01829115aab2a88
176 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous links pointing to potentially compromised websites and IP addresses, suggesting it's part of a phishing campaign or a distribution point for further malicious content. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/veguburawidosuwin.pdf In PDF document text
    • http://retco.ge/ckfinder/userfiles/files/21932784170.pdfIn PDF document text
    • http://obraz-tlt.ru/userfiles/file/wodutopelapiga.pdfIn PDF document text
    • http://asfalon.com/__files/file/buteguximubokigewaxu.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160abccb4dd564---vexavuzozosiserenubu.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608584799ab80---buferiruzumadujemaw.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-5/20210505125903444730.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16087e9b58389a---sewije.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/9126644319aa4c72a0a4bfb86a402c98/latazagabefukagi.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f02123c377e---66297520020.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/62142227738.pdfIn PDF document text
    • https://dermatologie-chamonix.com/userfiles/file/belubijudidejazidibo.pdfIn PDF document text
    • http://syntra.pl/userfiles/file/27295006846.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947121d21d0---xirukuburu.pdfPDF link annotation
    • http://factblogs.com/uploaded_files/userfiles/files/73516124743.pdfIn PDF document text
    • http://sooclose.eu/upload/File/lajibukurudamapo.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/rogarokemikujujapugi.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/45f268ffd9dcf55192c27a585f5cf411/nafogusogu.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/niguniritutivosaf.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/04e48d7fd2e703afd428b8d6fc95e704/88569269733.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/21133407876.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/b8gaan2p5nrgnpg2bgt1erm2v3/96951677561.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a698992904d---puzanezirixobezizaguragu.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e20696989---fozesi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=mitsubishi+lancer+ex+2016+manualPDF 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_off0000de45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE45 18088 bytes
SHA-256: d0280d495907b17fd4aa6b0b9ce07792c6325160689fe090895996f6399bba1e
font_01_sfnt_off00010db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C9 11172 bytes
SHA-256: bd179420e08a9d2e3e78d46529c424ea1d629220e064b57b526b3a7842cf4280

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