Malicious PDF — malware analysis report

Static analysis result for SHA-256 38e76993e8d9e47e…

MALICIOUS

PDF

83.2 KB Created: 2021-09-21 01:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e6f7960d3065425ac093472a3cd316b3 SHA-1: f69744f2f2c359c979c7573d5d5c243f8faa6d28 SHA-256: 38e76993e8d9e47ef52c65459b9c3dfdfedfb1275ce973a77097bd9f4605de81
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that redirect to other PDF files or potentially malicious content. Some of these links point to compromised CMS upload storage, suggesting an attempt to disguise malicious content. The presence of embedded URLs and the overall structure point towards an effort to lure users into clicking through to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://lateonsettay-sachs.org/userfiles/file/webagupipuxawapasanofobi.pdf In PDF document text
    • http://saint-party.com/media/file/wodaguwekisanopesafenija.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/74084772537.pdfIn PDF document text
    • http://digilit.ir/basefile/digilitir/files/28825360906.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/77423571972.pdfIn PDF document text
    • https://egca.fr/userfiles/file/samezoserosag.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/202197057475046.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/dqntbd36jpfrr9lqfk1okthu67/lemugupewawikuteroludix.pdfIn PDF document text
    • https://batdongsandothanh.vn/luutru/files/wonegidawo.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/weliputesapadeguvezixune.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613576d5b9250---745595435.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/1908685603.pdfIn PDF document text
    • http://osingenieria.com/images/admin/file/tevaxosozex.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/wudimiwezupolumasekodig.pdfIn PDF document text
    • https://alteanetworks.fr/img/file/44588155889.pdfIn PDF document text
    • https://armature.ir/cache/fck_files/file/refovaloximikatur.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/rapemixajamu.pdfIn PDF document text
    • http://foreverymuslim.net/home1/forevev3/public_html/foreverymuslim/upload/file/buvodokelepuban.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/vosibakof.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133413865368---lijulizoxanu.pdfIn PDF document text
    • http://potya.com/zugogakazuxotasaponu.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/8312007954.pdfIn PDF document text
    • http://nexxstep.nl/userfiles/file/5807550592.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=gta+5+online+money+cheatPDF 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_off0000e1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DF 10512 bytes
SHA-256: 2ddffb966a5c25bb86ea6591beae97353106fec924b6266a8a75fe1333e4d28d
font_01_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 17620 bytes
SHA-256: 3fdd34bc654a62790986dcd52501b9c3c7f912279008ccb506dccdf74f8bf59f
font_02_sfnt_off00012730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12730 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1