Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd082d5713ef96b…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 18:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 80e09e9ea5e53e8429ae800e7d3ba074 SHA-1: 4d7c8a242bd3246c0f537b925a816ced31665f31 SHA-256: 2cd082d5713ef96b4ebd02ec66eb60d79851f256158fef9f50f28214fb6fe18c
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a link farm pointing to external resources, with several URLs hosted on compromised CMS platforms or disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure 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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://mangonebike.com/uploads/file/nuxuwidirivebo.pdf In PDF document text
    • http://kamkmori.cz/ckfinder/userfiles/files/96025667894.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/24139754180.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/29053280812.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/gesusisuworeg.pdfIn PDF document text
    • http://parikshitconstruction.com/uploads/93910747637.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/nimotejitosuzubiwiw.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/xujegazoxitejewu.pdfIn PDF document text
    • http://ambulatorioveterinariosantanna.eu/userfiles/files/karotoxakajurezukaneriwid.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/xuxalikilip.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/ladatizomugawisub.pdfIn PDF document text
    • http://skomi.ru/img/files/file/68717547434.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161495abd3d027---76973927100.pdfIn PDF document text
    • https://safarekhoob.ir/basefile/safarekhoobir/files/19432245277.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/74559564927.pdfIn PDF document text
    • http://glampingcaravan.com/userfiles/file/20210913165735.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/31955999142.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/rafoduku.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/90821632291.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/werewipevorigat.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/meloz.pdfIn PDF document text
    • https://indiachristian.org/uploads/files/50033167857.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614800281b0de---xusavanusopobowokop.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16140e77f6768e---wefinakopupedubetipe.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/55708011729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=apps+to+watch+kdrama+freePDF 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_off0000e218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE218 10800 bytes
SHA-256: 37c1480a3064ac323d870e35b3975b251d6f4b113503d3fe41c6846444a95d84
font_01_sfnt_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 17176 bytes
SHA-256: 0e32ac160d15a9a620505546dc476d77489fa0754b0f3489151b8ee42de7afb7
font_02_sfnt_off00012702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12702 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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