Malicious PDF — malware analysis report

Static analysis result for SHA-256 eefbb18a90f161ff…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 10:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b359e02d693abfbae8227a9d0cceff89 SHA-1: 9b426ab1443009bb6a0c59fe53326a6d9f33372f SHA-256: eefbb18a90f161ff5a9d6af328bdbd84212fe890d8be974279b411cf898eae00
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to compromised websites and link farms, suggesting its primary purpose is to redirect users to malicious or phishing content. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://chcial.ru/uplcv?utm_term=mime+on+mime+violence PDF link annotation
    • http://gocep.org/data/userfiles/files/58961279844.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/83516126330.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/falitilinezoju.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04ffbd1015---xabopopudaxeke.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097728a6e94c---volujowifujegikivex.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7e063811b---kakiruvebolute.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609bb49f61ff3---13070488584.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/82244193415.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608048a334893---81749163049.pdfIn PDF document text
    • http://thaoduocvn.com/userfiles/image/file/balojujurupilogin.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611287b92ec6d---51573196457.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/gesexabufel.pdfIn PDF document text
    • http://rapet.hu/files/82878609728.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/sagof.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/49594544615.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1611ffa4def088---didivilaravimufevudexu.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210728013654533.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/15049350849.pdfIn PDF document text
    • http://artepcb.com/upload/files/6298895631.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/siwuvofisedigagulixami.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/22270407576.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/56102998010.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76b6d91d9---lujelusila.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/dugidixowozaginanajuperaw.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2402156f5---bederemitozopebuv.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/48495188585.pdfIn PDF document text
    • 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_off0000c6d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6D4 18624 bytes
SHA-256: b25473ce25066735741e6d148a8805a1a313a1a1c3e723a7d78c87d8ca91c5f7
font_01_sfnt_off0000f793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF793 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA9 9920 bytes
SHA-256: 1d0f2d0580601b833b3daeaf66d736addcd3105d12e2d2bd1111f7244e4145d0

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