Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e80b746de795aa…

MALICIOUS

PDF

81.5 KB Created: 2021-09-20 18:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2a3acc9a2d7ea2617c220ad5791b019c SHA-1: 1879715b064b82794caee05bc5c451e184e593e6 SHA-256: e0e80b746de795aad94259d39271f30ab53d0ac853d50a6cb56b0f70b6c89565
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external links, many pointing to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://inwebjor.ru/uplcv?utm_term=i+spy+apk PDF link annotation
    • http://partnerplus30.ru/images/fornews/files/rusadoxilejadegu.pdfIn PDF document text
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/piretikawoboler.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/27122522858.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614860d90069e---xonoxanufoseg.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210917_42790733A0B72467.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/9241639295.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/161397a79910ce---66792683364.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/0n18n0gau29nssdqme93sa3u8q/98410649241.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/niduxovusuwagapabof.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/57115954494.pdfIn PDF document text
    • http://happinessgown.com/upload/users/files/427141490.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202109090431543541.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/wimazoxejigedojebadajot.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/65827870591.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/fabibebejojixo.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/wowuwumamefixif.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/lajojutimirorab.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/36160226410.pdfIn PDF document text
    • http://sial.pl/galeria/file/54750518998.pdfIn PDF document text
    • http://fosterfreezesantarosa.com/uploads/files/18232021103.pdfIn PDF document text
    • https://mahae.hu/files/files/pijaburolajusajega.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161446f17509d0---44509814580.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_off0000dd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF550 17768 bytes
SHA-256: 22e4ca1109a4bdd2c27a96efbbf428a42a703a210d2a69c1c54106666971004d
font_02_sfnt_off0001238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238E 9712 bytes
SHA-256: 0ec9835de05c6a3bdc1c010665d3a559147fad146196820e68c539db7754be8f