Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a18996d417ff117…

MALICIOUS

PDF

103.8 KB Created: 2021-07-06 02:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1bf135a9ea13036a51961f6531aa6bf SHA-1: 8285f60c11ab08987a47b6f3b8345558494a5d9f SHA-256: 1a18996d417ff117beb90b170a3af7517b7cd09062d6ddaec866ee3010e655ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple URLs, some hosted on compromised WordPress sites, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. No scripts were extracted, but the structure suggests it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fullcolorspandoeken.nl/userfiles/file/sixovezevomoguwe.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b4bf1ed7c97---xilininoxovetamadufodoso.pdf
    • https://atphp.ch/userfiles/file/84084726081.pdf
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/fa405325512311fcb6817b4d8c3f7f6b/85975829141.pdf
    • https://contabil-fiscal.ro/mm/file/litasewuwu.pdf
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/8dcc376f4086cf94212b6f4a96af203a/47446847269.pdf
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/3ae27a02ad06b557a9394103189fc020/79256967803.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c03713cf8ff---zowegedaxusododibebitesi.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/ace47fda2ef1ffa931c9da8e44675b97/zibolurogafilaxefesopoz.pdf
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/tiremosu.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/7r9fedrblsq7jgmolgqbn8be30/jofuwefonazigizada.pdf
    • http://ajivikafinance.com/userfiles/file/24770386653.pdf
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e8b81b718---kituxonaw.pdf
    • https://lacecinella.com/writable/public/userfiles/file/rimumudururimeselosoduz.pdf
    • https://ka-base.no/images_content/file/gokuwozovafemitabenexi.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/14755589262.pdf
    • http://augustaelectricalwork.com/editorData/file/wadutenigev.pdf
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b10555558---51056581379.pdf
    • http://border-inn.com/CKEdit/upload/files/surinibadirovimovasejuxu.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16084b52be1497---8626457755.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b9850964---4054036307.pdf
    • http://laiyi-art.com/userfiles/file/22769471912.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=which+organelle+creates+the+energy+required+by+cells
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013331.bin
b45f239c1be45a6abb25b6552ebb946f2dcae5250445b566f008600b25122f16
pdf-font-stream PDF embedded font (sfnt) at offset 0x13331 17240 bytes
font_01_sfnt_off00016039.bin
427a8781a632180c703cb2d397f90e4f13cbf70c652395e1a6a73a1958c15cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0x16039 11144 bytes
font_02_sfnt_off000179bf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x179BF 16792 bytes