Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2e704eb3ad1776c…

MALICIOUS

PDF

123.2 KB Created: 2021-06-30 04:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c6b485231e14ba1316fd94fabbd4301e SHA-1: e80159fbd0b8c37276cfbd0f62d96e5e4acbbd13 SHA-256: e2e704eb3ad1776c641c26dafc05aaa3eef047411a74b8666ad5bfac654fab50
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a non-clustered link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://laborke.ru/uplcv?utm_term=statistics+for+business+and+economics+12th+edition+solutions+manual+pdf+free PDF link annotation
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/dmh376l3hh30vgvtib66i9mpla/91217527994.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/38030550083.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/cc5a97a9f021d513f23f14f543785e63/bamurifuredefazokap.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48637acea9---tufefiwetipuxirisudidanaw.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/3be001e0bb197603fd00873657a9e8bb/papase.pdfIn PDF document text
    • http://maasmartcity.com/userfiles/file/7306351148.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/sirinezurosazusu.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160acb33567e93---selabewitawisuxafulewip.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/potagajitajej.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/sutazujixisigamoxinavir.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d4d95d255b---66473453583.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/27ff6948a2feb5c0b1e9e5e83d234dc0/48631973063.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/7afb533875d8ef23471a9c50bab22350/70933293919.pdfIn PDF document text
    • https://ccskin.com/geektic/files/38929847762.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609824ca92980---81013301198.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/81287935056.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/073f1adb0512f3571e98c169318d2d74/41850395768.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/5co51eqvaq9mg9lnektv7gsd38/goxipijufofituwexafasi.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/loxekolumu.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/kojagoxunafovezisixi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3be4ab20e---mamiwojovoguwuzisafar.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082c6320a5ec---91810209655.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b3f6e4a3a---93195828478.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2383503d66---wowuwedawodorifazutir.pdfIn 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://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
font_00_sfnt_off00016192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16192 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000179a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x179A3 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_02_sfnt_off00018ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ED9 11372 bytes
SHA-256: d2c20ec64acdbe1ee26037c0d91d2f6e3a8c412359fa04a97947fdc540b0bb64
font_03_sfnt_off0001a944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A944 19652 bytes
SHA-256: b8691768abc43831d2bb578f4e551ad8ca1ad81c416bad24489ccbb414d909e6

Open this report in the interactive analyzer, or submit your own file for analysis.