Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2f5152d09f9c67…

MALICIOUS

PDF

105.2 KB Created: 2021-07-29 20:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a7f11e471eae0cf7bf96b44ba080c2c6 SHA-1: 1e5974c066a43320adc6082f536d9cc94eea61dc SHA-256: 1e2f5152d09f9c6750cba7c80dbaacefab8d69cca0112ec3fa8514bc5aa63d48
156 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting, likely intended to lure users into clicking malicious links. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9857

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://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a22e93f2153cc3f2a531548f2c276f81/sefumepedibokimanofel.pdf In PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0f45f07a8b---zozedopatajotugiwegafizom.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a38ead1e714---ninoguxaritorakobij.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160863117a44f4---64118744117.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2783b6ee1739dd7c09f9b897ed7f2d5e/pilofojenonijelaru.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/navilarinulos.pdfIn PDF document text
    • http://fgosvo.ru/files/files/vinaru.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/16086c5d26fe02---jejowipurazanojafevisorav.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609191f531a2f---29911688686.pdfIn PDF document text
    • http://bjjiffy.com/upload/10371659133.pdfIn PDF document text
    • https://hagepoorter.be/files/files/xolejowatafobufesoja.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/dcfa37759a37302de7fcf3390fd9556c/jiragureboditimadagoxi.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/3789963267.pdfIn PDF document text
    • https://www.psk.com.au/application/third_party/ckfinder/userfiles/files/viduragoliwikeb.pdfIn PDF document text
    • http://bhk-aindling.com/userfiles/files/rovedasotajajelidubob.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/8577009880.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/71793343079.pdfIn PDF document text
    • http://xutricolor.com/uploadfile/files/17918635857.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/564f33085816995e5da06aa956d66862/namigoriroj.pdfIn PDF document text
    • https://palet-school.com/files/files/voderefojifopus.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/3499411522.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/fuleve.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ecb2d11a0---jusizokafegekufuviriw.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/b8a368fa65e72b9a62a9b9cc1fea3322/26261397927.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/lovukorumezuboko.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb6ffa887f---lomisuzefuwawax.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160beedddc9904---bofunafego.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=tropa+de+%C3%A9lite+peliculas+de+accion+completas+en+espa%C3%B1ol+latino+2017+hdPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11742 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F59 11548 bytes
SHA-256: 1b515e5c6939e883a5295c4374b90c0b0131d11699dcd3237082a9b5293864d8
font_02_sfnt_off00014a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A09 16944 bytes
SHA-256: ef0329dac4803480f2d6f4d9e9c4ba3aed2817dbf0857a17f9b8becfccd91a33
font_03_sfnt_off00016157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16157 19088 bytes
SHA-256: 96d66a7e27228d99b225180a0e8ddda80f7c0736c5d1842d6041bc0ca1239e5f