Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae323ba61e971ef4…

MALICIOUS

PDF

71.2 KB Created: 2021-09-11 17:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f264cffe2b7d3d7d2e1ff6dfc205eb3 SHA-1: 4e7b0a6715df03a1045cf8da4ab97a688f13bcde SHA-256: ae323ba61e971ef45d3304737db0e625b22098d84576b3b74bc0ad73f40ed629
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The embedded URLs, such as http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce33262f2---zavuzujodapigaronujovev.pdf, are likely intended to host malicious content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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 http://tuecpa.com/file_media/file_image/file/85468045315.pdf In PDF document text
    • https://loyallcanada.ca/editor_files/file/51433568809.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16130e197a00c4---kanumokelugogebabe.pdfIn PDF document text
    • https://italvaping.com/file/mujozese.pdfIn PDF document text
    • http://ippon.lv/uploads/File/gipakijonovajuwuxamo.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/67358841033.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce33262f2---zavuzujodapigaronujovev.pdfIn PDF document text
    • http://club-integra.ru/userfiles/file/25648650095.pdfIn PDF document text
    • https://www.potravinyav21.cz/ckfinder/userfiles/files/41654139664.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/xamosaxizaki.pdfIn PDF document text
    • https://sca-eagleegg5k.com/ckfinder/triplebuserfiles/file/49780957800.pdfIn PDF document text
    • http://satakantaresort.com/user_img/files/61408568250.pdfIn PDF document text
    • http://5percent-design-action.com/upload/users/files/wezuminoma.pdfIn PDF document text
    • http://surausa.com/uploads/files/tanokatorokomani.pdfIn PDF document text
    • https://akemi.ro/hirek/file/fujiweta.pdfIn PDF document text
    • http://form4concrete.ru/pics/cont/file/77115733029.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/64795769763.pdfIn PDF document text
    • http://eikenhorstgroep.nl/userfiles/file/51423511987.pdfIn PDF document text
    • http://mya1fc.com/files/ckuploads/files/53175908253.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a513d15fe8---55028082145.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/kosejulebekojatox.pdfIn PDF document text
    • http://ecoaga.com/documentos/file/1947743238.pdfIn PDF document text
    • http://puebloexec.com/userfiles/file/bemipetonosurizuxam.pdfIn PDF document text
    • http://naosgym.com/userfiles/files/83304891340.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/rusojarugejonevivenofub.pdfIn PDF document text
    • http://www.depomatrial.com/file/raxuxulakibijek.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/55822552576.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=gardenscapes+mod+apk+unlimited+stars+and+moneyPDF 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_off0000b571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB571 11020 bytes
SHA-256: ca54ab94149893215b6f1a57730d52576ab2d2bab4af2cbce8b7b9f51decbe89
font_01_sfnt_off0000cf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF15 15584 bytes
SHA-256: 415e79f7989c59b89b4f997e5c263e7a9bac2c4cd07a185fcbd96639160ec5bf
font_02_sfnt_off0000f69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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