Malicious PDF — malware analysis report

Static analysis result for SHA-256 2314f627297cc9b4…

MALICIOUS

PDF

72.3 KB Created: 2021-09-05 12:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8a84bc3a5be4b662058e72932316e1bf SHA-1: 802025fae590e3e74583bd0b0d8dcbe836d732c6 SHA-256: 2314f627297cc9b4b6aaa5a9af13881cb07a4b267872bb27dd7659bed939f832
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to numerous PDF files hosted on various domains, suggesting an attempt to distribute malicious content or phish for credentials. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to potentially compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://andymullinscommercial.com/home/andy/public_html/ckfinder/userfiles/files/nozakek.pdf
    • http://agriturismolataggiasca.eu/userfiles/files/93392991214.pdf
    • http://hotelbelleepoque.bg/userfiles/file/wuzuke.pdf
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/22090248805.pdf
    • http://apple888.vn/luutru/files/67517010517.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4456a57b54e2a0b45f06487a8cf99a58/nukelemawemogazamatarosa.pdf
    • https://szallas-karpatalja.hu/upload/xuzikewabegasedisume.pdf
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zodekanemex.pdf
    • http://cloverpark1959.com/clients/51168/File/ditewep.pdf
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/a9n5l6ohvmlsq2lp1h8eo29n5t/petosuseze.pdf
    • http://crackershrimp.com/file_media/file_image/file/ledenog.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/d955ed56fa300ddbb740d40b1df3a57a/13256866646.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/b00296f86da95cd5ef0702d5cce09433/sudixeroguzeviroluba.pdf
    • https://meesens.be/KrMee/Tekstverwerker/rimijenesejalijaxalatodod.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/rirodunenesuzosexilub.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/v5ctr0naqtsqord63il20d9kir/31043429853.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/be8782a4933dd95a5314b8f4261eb140/gujapu.pdf
    • http://chukysovin.com/img-svc/files/pofojotem.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160bee03802615---253762938.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f143fe88e28---60801491597.pdf
    • http://chamdure.com/DATA/files/33569934387.pdf
    • http://dentalclinicbangalore.com/uploads/56299182093.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607f133634785---5238993565.pdf
    • https://dejavuruse.com/userfiles/file/rukinituvebusatero.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/d97911ff6faf531e73f19b3051c1045f/56222202838.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=isaac+albeniz+asturias+pdf+piano
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A1 16792 bytes
font_01_sfnt_off0000d0b8.bin
ca0e940de4dd8a5cfe7f25ee81575e4e9f8206cf7ecddd645469c2351c66764e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B8 10864 bytes
font_02_sfnt_off0000e9c2.bin
9fcb6b5142f600c7d481658892512f6b3ce97b450be5af6011bbf28196c2c29f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C2 16552 bytes