Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea1a219e735b69a…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 13:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23c25358ac133778ce86ea1a6ace78dd SHA-1: 26c79276cdb4acff21282bd7dc5d1abe7f23db1a SHA-256: fea1a219e735b69ab9590b879a88ffc2ca109822d264248717f31744bd854c18
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous compromised websites and disposable hosting domains. The embedded URLs, such as 'https://synerhu.ru/uplcv?utm_term=remix+os+player+windows+7+32+bit', are likely used to distribute further malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://synerhu.ru/uplcv?utm_term=remix+os+player+windows+7+32+bit PDF link annotation
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ujcbda71boqukth1jgtt3crosd/59233801588.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/mopogoxowajojiwuvujame.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613021f02759c---matibopedujubopojemota.pdfIn PDF document text
    • https://endobible.com/userfiles/file/39330300107.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/96026762334.pdfIn PDF document text
    • http://archiw.gbpopatowiec.pl/img/upload/files/modarivugitolukiz.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613654b5b3a7b---58683441483.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/togujixoniwawadamexux.pdfIn PDF document text
    • http://nifaelectronics.com/userfiles/file/22011727153.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/witarufedagotewirim.pdfIn PDF document text
    • https://i-intelli.com/ckfinder/userfiles/files/xopanejumabuforubikoxu.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/guwejujoji.pdfIn PDF document text
    • http://megatex-plast.ru/pub/file/lujalaleriledesopi.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/e0ef4c374f46167f03d33360e49fbd45/favokapuru.pdfIn PDF document text
    • http://farmandari-sarvestan.ir/images/news/files/biwuro.pdfIn PDF document text
    • http://pbhdom.eu/userfiles/file/48957754642.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec1c440b4e---72096738198.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/35295bb8f7c700b847defb903c57f3ef/gogilunejizezinisifo.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/5a63efb98adb04252bcb31676e13e561/63790948611.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.com/ckfinder/userfiles/files/61131155434.pdfIn PDF document text
    • http://ychnjl.net/userfiles/files/dalebewumuvud.pdfIn PDF document text
    • http://enjoybowlramenandpoke.com/uploads/files/xalaruru.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318e2a9f2f1---kanuzadulezevefese.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/91507866576.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/91105397079.pdfIn PDF document text
    • http://daphongthuyhueminh.com/uploads/image/files/78785959271.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000faf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF2 11384 bytes
SHA-256: f1a43a17f6aac5e1b7e78e7feb4ad518d00e030a82c945dac962f8ea2181888e
font_02_sfnt_off000115bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115BF 16944 bytes
SHA-256: 96043a8c2089ce4caf7c16845d7287758735a16e670b6851b9836133a451bd50

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