Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1ecdf5179183bf…

MALICIOUS

PDF

81.7 KB Created: 2021-09-10 03:06:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: acaf080eb18e65cdee98ac69210ea453 SHA-1: fbe59376b71bc515a6327d9497fc7728ee8ab513 SHA-256: 7c1ecdf5179183bf797420b944e9c1e12660da757d8993ba0eefd1eda108604a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5cf22947a---25297636613.pdf, are likely intended to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://nousgarage.com/userfiles/file/54252708658.pdf In PDF document text
    • http://jullien38.com/ressource/site-image/files/87433668801.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/jafinatogitatija.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/31557244444.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/dilaw.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/50619822976.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7vu86m7t2tj34djd1r23g0hjs6/dufowemikeg.pdfIn PDF document text
    • https://brs.jo/userfiles/files/demorasuwavafiwen.pdfIn PDF document text
    • http://azbuka-d.ru/ckfinder/userfiles/files/93750564519.pdfIn PDF document text
    • http://attep.com/home/sandbox/domains/heekee.com.hk/public_html/ckfinder/userfiles/files/nelag.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/io95dblkkke1h08ul0qcblnofv/2940833134.pdfIn PDF document text
    • http://isleford.com/filespath/files/20210908021031.pdfIn PDF document text
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/4533487836.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/58294653480.pdfIn PDF document text
    • https://webhosting4.net/media/file/disowotomo.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/55433365259.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5cf22947a---25297636613.pdfIn PDF document text
    • http://toanlinh.vn/upload/files/70191020214.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9024ab616---76022927949.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/xojosimilugu.pdfIn PDF document text
    • http://reklama-v-sochi.com/ckfinder/userfiles/files/ramokagejetegekalugepusan.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/88309069669.pdfIn PDF document text
    • http://cbstav.cz/file/62996317580.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=angry+bird+epic+hack+apkPDF 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_off0000dd19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD19 10688 bytes
SHA-256: 8f5313358eef0067019a8e395fc97d8a5c2de06f027b43c92a7ecda8c89a9969
font_01_sfnt_off0000f51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 17208 bytes
SHA-256: 5765eaa03faae7cf772241267a96904b4f6447f7b2ff44069a40fb9b6dfe2a89

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