Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ae445d93ffbaa5…

MALICIOUS

PDF

73.2 KB Created: 2021-09-08 19:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4ed8d6db440ae83d5e3b99cc096d19ea SHA-1: e7e257a587544e0b0c2452ccc54619fc3d4e76f0 SHA-256: e9ae445d93ffbaa525914978c9a5c32df8811b91facb0e17918be67b505a9209
176 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings point to a malicious document designed to lead users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://allytemp.ru/uplcv?utm_term=inferences+worksheet+2+kyle PDF link annotation
    • http://chip-chup.hu/upload/file/rokagufepulazasavituvokok.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/jadanajakufesilej.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/zumokogur.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/95995749506.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/rirupagipuguzixuwupod.pdfIn PDF document text
    • http://aotwresort.net/ckfinder/userfiles/files/5931835045.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/julufunuxomeletix.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/buwamulupiliworomet.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/mupajibopekurejegaf.pdfIn PDF document text
    • http://dbexpertise.fr/catalogue_dynamique/file/zudojataxubezokojoz.pdfIn PDF document text
    • http://purel-biopharm.com/upload/files/54137811242.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/fipurixuxasosivum.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/24936299718.pdfPDF link annotation
    • http://studioarclab.eu/userfiles/files/fomovedevadudoriwux.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/2364816007.pdfIn PDF document text
    • https://vrrc.heart.net.tw/ckfinder/ckfiles/files/zivil.pdfIn PDF document text
    • https://danfort.lv/userfiles/file/petugovejop.pdfIn PDF document text
    • https://www.winsum.frl/ckfinder/userfiles/files/3609537237.pdfIn PDF document text
    • http://westernmaki.com/uploads/files/nekovupoxe.pdfIn PDF document text
    • http://2m-m.eu/userfiles/files/58736227442.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381f3089935---22089488890.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302231636a7---xuzojezuteneg.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/93647764026.pdfIn PDF document text
    • http://alltimescare.com/attachment/files/totenopujixakobuxa.pdfIn PDF document text
    • https://parvazyab.com/basefile/api203/files/18744530474.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/3e5ae012e2cab92735400c2d77d1db4c/tasopofukuvitakabulifo.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_off0000bc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD425 17404 bytes
SHA-256: 33de67d9e06cf5ed2a3086d10a97eedd0aefc0622330e675bdafdf229dc70fdd
font_02_sfnt_off0000ff8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF8D 10540 bytes
SHA-256: 05fb9d4ae25bb9df3d7564dedfaddd5d2b73864fece8cc44bb26d8cc77e930ad