Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb8432a935d11a7…

MALICIOUS

PDF

66.9 KB Created: 2021-09-04 02:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf48515f1ed7a0cd29b54255c3877b1f SHA-1: fdf107e873004d413856fe53dd08c2876ec8f267 SHA-256: 1eb8432a935d11a7c5e077c664ffd915c7ec19efe4d8086597d2170366f53e8a
176 Risk Score

Malware Insights

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

The PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or redirect users to phishing sites. The document body is heavily obfuscated, preventing analysis of its specific content, but the overall structure and URL patterns indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://kingdomofgodmn.org/userfiles/files/61180521475.pdf In PDF document text
    • http://vistobrasil.net/uploads/file/97441294286.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/92b6f9e2ce00c069b226d67308c93520/konibon.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/da79bf288bec4243dd7578a64fb967e2/lirimat.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/wapufeborox.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/64756318384.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/pijejuduxijonawafuzuvora.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c016e900061---50782683351.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/8941248167.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/vebolofavozikufet.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/2799585451.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/51687407471.pdfIn PDF document text
    • https://hijaulumut.com/contents//files/busewojil.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/32618811814.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbbe94d737---85772683067.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/sudodiromedawidu.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/70c338b6b2e1204d3b449dbe34e46777/nibateruxawuzofof.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/12849727215.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/55834656013.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/xanoxumapobakawigamot.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b77453d1ceb---97010154341.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/zufiwid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=protein+adalah+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_off0000ad87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD87 13712 bytes
SHA-256: 28a9a147d4d7fb7f7d69d9468525d93fda50e50eb7037d0035b4011778ac7b9d
font_01_sfnt_off0000cf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF07 10428 bytes
SHA-256: 8d8bc338f99d0223024b833ca912b74d619773ec7438e3cb31ca69ff83195454
font_02_sfnt_off0000e67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1