Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecba00dacc65d246…

MALICIOUS

PDF

90.2 KB Created: 2021-06-13 16:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5baf022c511e3449852a53d601669995 SHA-1: cf94d99bffa8d35e3212be005155e135ae3b150e SHA-256: ecba00dacc65d24644b99778180f86be6ae4130b88eb221cf87b558f14652f5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites and disposable hosting, likely for phishing or malware distribution. The embedded URLs and the nature of the heuristics suggest an attempt to exploit users through deceptive content, potentially disguised as movie downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nomylo.ru/uplcv?utm_term=moana+2016+tamil+dubbed+movie PDF link annotation
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/ml2mhhkfs6lvbq7eju6iumtbh5/34051747040.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/f77c8c3076700e92107dc47376257e7b/xewileve.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06af48c416---zowibugogitezule.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607627bb5bc5f---85072908419.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607800b93f92a---molijomumotepuladi.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608394c7b80fc---47695346499.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a64e3975df---fodopeketigilufibe.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/vufurupozefosagatazes.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/b800542693b307b281359d0a7cae1e86/25606021997.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/42508866934.pdfIn PDF document text
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/nilaten.pdfIn PDF document text
    • http://beulahcooleycollection.com/clients/870349/File/fedel.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafdf836b5---53844414969.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160700ec2aafd3---luboluwitekilo.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/da48f49051d1c0842d2f247054f3b808/kevepupamajomujadijixirem.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000100f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x100F1 13368 bytes
SHA-256: 1d1d5ea0880f0a0ab99d433e5d1b14ab688f78637aa8464d1f18de499d8de3ff
font_00_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 5384 bytes
SHA-256: 1af78764af24d7dc8e881e7ba2687063eb4ceb7e867f942593f4acfa10cb1a25
font_02_sfnt_off000120c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C3 11084 bytes
SHA-256: 5be32cf6337ce3ff521523fa4ee84d2f1044b6f037493111a26f89d5154d972b
font_03_sfnt_off000146d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D1 16060 bytes
SHA-256: d26390a1b495fc4844790f49287189703365677ecb3af67b7cca25d146cf5ea9

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