Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2cceeb6684ee55…

MALICIOUS

PDF

83.8 KB Created: 2021-09-06 19:53:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e571770106d2cfc9780366698256d639 SHA-1: c1353618367bd6d880158c6dacad425f48c31718 SHA-256: 8e2cceeb6684ee55bc88ccec19de761b684ccae2577a8f47852e40dee7831ac1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick users into downloading a malicious payload. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9dc10d97d5da75978ab46906dfcd58ad/litukirojadupujujironibiz.pdf In PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/jadajonipitosedo.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/54755135066.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/6deuo2ufo68g0s67dfse63pcu6/lexunudinakizapezijolo.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/51988030206.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/1751850006.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b49b34b1b01---91070222472.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/lezewisisajofupugoveg.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/dr6a272t5le2bcj19g964qh2cq/18835211632.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/netovogabikiz.pdfIn PDF document text
    • http://urgentcarepb.net/userfiles/file/jogogidadigidopebuf.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/85154959046.pdfIn PDF document text
    • http://zhongjiukeji.com/upload_fck/file/2021-9-4/20210904190210842675.pdfIn PDF document text
    • http://srlamn.com/clients/0/00/00e84243199fd86ca7c15d66a0237eb0/File/lelirigox.pdfIn PDF document text
    • http://poorclarescork.ie/images/mekajiwowiwojikuxebipeno.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/suturewonojujoxetegef.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/22401780891.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/jifajumekuregarixedebov.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/8863c6f3bce5289f3a679540b27c5cf2/sibamivovapafabefudobumo.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/20167759508.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/matelitefavegorotiwelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=ba+sociology+book+in+urdu+pdf+aiouPDF 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_off0000db32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB32 11064 bytes
SHA-256: eec695383f9135a084357a114d2d6be63e78e080da91736b159d96d8621ff7a5
font_01_sfnt_off0000f4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC4 20220 bytes
SHA-256: cd34e3fa18e7df20174eebab9eddf656352cab05dcfe996cc60ac3985f53a53a

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