Malicious PDF — malware analysis report

Static analysis result for SHA-256 050d86578554f5cc…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 14:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ccbbd83474c3fa821262b1b750fe1007 SHA-1: 067288f1eb55a331508c7a175debfc11b85b0a0e SHA-256: 050d86578554f5cccfb3010ac37f335c39b5590fd81ccce10a05e91c8f5a3f84
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The 'SE_CALLBACK_LURE' heuristic indicates the document likely contains a phone number presented in a context designed to trick the user into calling, consistent with tech-support scams. The presence of numerous external links, many pointing to potentially compromised or disposable hosting, suggests an attempt to redirect users or host malicious content. No scripts were extracted, but the PDF structure itself is likely exploited for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://futurefacesnyc.com/uploads/file/vubuzezazesomo.pdf In PDF document text
    • https://bruceautoservice.com/files/file/bexopi.pdfIn PDF document text
    • http://viorina-deko.com/images/file/68697894592.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/sowara.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613c21064a71d---wazejomol.pdfIn PDF document text
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021981387727.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/92546738372.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/wejumaja.pdfIn PDF document text
    • http://imaginove.eu/data/Files/xaromime.pdfIn PDF document text
    • https://ngenadmin2.nextgenphotosolutions-beta.com/app/webroot/files/file/bulujimawam.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/pamaxedapupejesesofegu.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/pezuwupiv.pdfIn PDF document text
    • http://psycare-spb.com/userfiles/file/tosorana.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/992954005.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/95014323263.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109140410405228.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/161416accbb39a---91836062599.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/sopitemod.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/sapilowajeruviwuxez.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1613fcfc481cf5---kunuvaxuzukofowinawosiw.pdfIn PDF document text
    • http://ballmillfactory.com/d/files/38249678349.pdfIn PDF document text
    • https://wigs4less.net/nbloom/fckuploads/file/zoxogibavufe.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/55936892843.pdfIn PDF document text
    • http://ativn.com/upload/file/felatedemukamejos.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130727e0aefc---12613252603.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/fimut.pdfIn PDF document text
    • http://vinaaquachem.com/uploads/files/kobamumabibasokuwen.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=medical+surgical+nursing+book+2nd+year+pdfPDF 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_off0000d290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD290 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eaa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA7 11256 bytes
SHA-256: e0f4cd9655a61840f3345cefae75fa04b9c0c6a8d9400ec14773b7e5e275ecc3
font_02_sfnt_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 17760 bytes
SHA-256: 81d77c1f2bd73a09b79c4821ff9c3e49c2497747c2e7de3d850d618b206f1aa6

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