Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e7a1060fe4c72c…

MALICIOUS

PDF

80.9 KB Created: 2021-07-12 23:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 577942c14fee76f030f08a256ba58fd4 SHA-1: c0e2619bee0a24d8e91978781e4465117dc625b3 SHA-256: 99e7a1060fe4c72ce6a852f08a8f2f6a91a6d6c1c2faca354ef593d8643a275b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites acting as a link farm. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c038612910f---rowomewobepebupipobejiz.pdf In PDF document text
    • http://icltindia.in/userfiles/file/40260354754.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea776afe17---takuronarelolagebo.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/3c93cd6c6a0f78c285b2a1a89d06b71f/vafar.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/55666112008.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/mesejilifunawawaj.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/598f029330c0630c9ba413f2de249f35/70864691123.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad584cb7941---13593824098.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4fe7f32d69---39744769150.pdfIn PDF document text
    • https://harom.ro/files/file/57047297090.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/0bi6vl92mgaca3io2d0e5gqug7/31149660024.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/hlbj46nmai79inas5v1fda4pta/sofenudunef.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/jufajokexoxiki.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/viforaxexa.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/182437555.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/32223282057.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/5428298442.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a4d7b2e25---bufazuzevogirevil.pdfIn PDF document text
    • http://hanboo.cn/Uploads/file/2021061912552670554.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/b8cd14246afa85d9d73ae9614fb0b3c5/99182001524.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/73549498954.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/jomuxakozenobikexajawa.pdfIn PDF document text
    • https://bhiringisamsankalimandir.org/ckfinder/userfiles/files/67342547035.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=mol+oil+and+gasPDF 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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 17424 bytes
SHA-256: 557b342f58de7793263f23de51c874ac5f033a294bd1d5f837d68e9c24629dcc
font_01_sfnt_off00010842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10842 10084 bytes
SHA-256: de6cc224b06aa61504e51e5eaba5bdb0656f5b299d0518fe9aa777834c2d09db
font_02_sfnt_off00011e8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E8A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1