Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a610c95e626afcd…

MALICIOUS

PDF

82.3 KB Created: 2021-09-18 14:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f1d6790655325e4259fadea443d36cd8 SHA-1: e74684baad3b40380db36e35d7bf92f6e1eea1b1 SHA-256: 9a610c95e626afcd924073cc8c33ef424ee2cc9b39725080ffefee9af1cd6c54
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. 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 lure users to malicious sites, likely for credential harvesting or further malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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 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://marta-galan.com/files/varios/file/26434922645.pdf In PDF document text
    • http://namngonviet.com/user-/files/39672201351.pdfIn PDF document text
    • http://artvideo74.ru/upfiles/files/gawuwemuzelovadenakexuse.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/wesununipofomadovade.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161377d260cf7a---wogojexekuwixe.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3d3b139cc---pomasitusenokitel.pdfIn PDF document text
    • http://lgassociates.in/uploads/97892971986.pdfIn PDF document text
    • http://ohmamakitchen.com/uploads/files/jopiraso.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/b3c48557d33b9a642d1a0ced36d6ab30/94193878629.pdfIn PDF document text
    • http://yongqingtech.com/d/files/lakixopepidutiputixawijon.pdfIn PDF document text
    • https://xn--90aoja6ahg5ds.xn--p1ai/uploads/files/zugoba.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/nozetiludoni.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/41508592110.pdfIn PDF document text
    • https://e-room.co/userfiles/file/49002101611.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140c81f08397---daxiravidevanosuvuwaja.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/fewetenok.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/19617637643.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140b75dc2086---fumilutizarewizi.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/58562205507.pdfIn PDF document text
    • https://webvitamin.vn/app/webroot/uploads/files/kapifu.pdfIn PDF document text
    • http://carrozzeriabosini.net/userfiles/files/susib.pdfIn PDF document text
    • http://eia-edu.com/userfiles/file/88167650261.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/jagunodobodiredal.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/57451568861.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/lapodomuzuretimo.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/xazekuzax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=tom+cruise+and+jack+nicholson+moviePDF 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_off0000dda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA3 10888 bytes
SHA-256: 01975614203a76920d74348cf1ceba502c9251f6b7fbccb26241c7627fe18574
font_01_sfnt_off0000f690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF690 17260 bytes
SHA-256: 596110581707233b5f47dad962a88259d96a10f24400f4bbf8b048c9dd880aec
font_02_sfnt_off00012318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12318 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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