Malicious PDF — malware analysis report

Static analysis result for SHA-256 20aa69771f12a59d…

MALICIOUS

PDF

99.4 KB Created: 2021-07-21 18:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a69a2d7a342372f0e634ef401bca10ac SHA-1: d2dac805dfc8126726a88dbf3ebaf5964a931093 SHA-256: 20aa69771f12a59d4b3df6cbc573ca19557d43bff57d0cf5fda33e5e85c970ea
156 Risk Score

Malware Insights

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

The PDF 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 domains, some of which appear to be compromised WordPress sites. The embedded URLs, such as the one pointing to constructionone.com.br, are likely intended to host or redirect to malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://platcometals.com/images/file/lajavixixox.pdf In PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/bogiguxojatozinefitasuju.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///wikuxanelikuwufi.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3bdd7b5a6---81943812356.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/boxazasivisaf.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607dac03639e1---wamunolu.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7737730c0---xozijanufatuv.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc509430fdb---boredakizanebex.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/0642268979045e77629e7bf0d9313a32/xivafejojubabaxasazu.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/sivafuliwaminadajab.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/bapurusix.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/1fa4894c73e04eac2ab57956e02b55dc/26593108733.pdfIn PDF document text
    • http://sivam.pl/files/file/81582855847.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/f806714bbedd86ae789bfbcef27a6fd3/zovupelu.pdfIn PDF document text
    • http://orrizon.ru/images/file/2513520078.pdfIn PDF document text
    • https://study4student.com/cache/fck_files/file/xigomoran.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/vuliwuza.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077286d76dd0---najilomiroj.pdfIn PDF document text
    • http://zigzagontwerp.nl/sites/default/files/file/91557593226.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf08c58c0c---morasidowezipokatorurap.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/wofanatizumowawedonopibo.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/54891877265.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/fr972n73tto8k9e2ia98psv075/nazeraxapedinetiwage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=nicholas+sparks+the+notebook+pdf+free+downloadPDF 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_off00011905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11905 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001311c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311C 11012 bytes
SHA-256: 3b4d5d04f6e383c7664c159163b36ef13f5049f89ef4622a947b0a492bfbeb52
font_02_sfnt_off00014a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A84 20324 bytes
SHA-256: a293f0112f9b025eefea7b70c0a731c34f0e4016c329364468b138a0b1faa1c3

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