Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fbcd8d177b4da0e…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 05:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e16d171673cc51a8257c0e0089dafc89 SHA-1: 113457372cc9f55cf434a98c3de05cd2b1727cfa SHA-256: 0fbcd8d177b4da0e5bee15bc46ea548f9280ae9bbd644537c0784a69dd8095a3
164 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable hosting and compromised CMS upload storage, indicative of a link farm designed to distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a 'download' button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://africa-emergence2019.com/userfiles/file/jegibosoxovejijoxexol.pdf In PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/37948195898.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/d708a75367ee9e8a83b7724254f917ef/wanujesajube.pdfIn PDF document text
    • http://mnwebdesign.dk/userfiles/file/rubepatipaj.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/sutosibevivudediz.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16087ff10d6ed9---55592110319.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/4292846525485856ecfc220bfcc3dd7f/lutit.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/3882534286.pdfIn PDF document text
    • http://parkhigh65.com/clients/4970/File/nunozawuvujizede.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/36479697972.pdfIn PDF document text
    • http://bereanbaptistashton.com/clients/1/1c/1ca8668e480cca1e897b6add33210fc6/File/25467952252.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fea63dc8d2---82821185947.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa40b234ebd---49174447602.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/54636669370.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/93081131100.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/4b6e32ba9384eb4474927127c3df18b7/zagopijetizejegakaride.pdfIn PDF document text
    • https://autoprofi.ua/userfiles/file/gamifaxoge.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021052708445676.pdfIn PDF document text
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/afadde8bee940a2ae8c845b9239ef999/72716686385.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b769798f7c1---vojol.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/43150435508.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/fcbb14c0863b016360aa7877cd4d24e4/85521560934.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/26164175228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=mental+maths+questions+for+class+4+with+answersPDF 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_off0000e9aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 11004 bytes
SHA-256: 981b91bb0e970ebf6ad2bff1591cec9334d1c5220966e60178d0e796a1f98dbd
font_01_sfnt_off00010325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10325 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B37 17936 bytes
SHA-256: ea3694c491376aa10fbea4eef060144802bba707f2df71d7ae3102f5d23c4e2a