Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f12edf0e46454c…

MALICIOUS

PDF

88.6 KB Created: 2021-09-02 10:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d87c44fdcc28e58a0d3edd5c524fd27b SHA-1: a19f3b5c100dedc079b72499da62c841353ca1e0 SHA-256: d7f12edf0e46454c00baf5a4b83eda6e97ac3d3dc530e1a37cc62405f8f59916
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://garglob.ru/uplcv?utm_term=rrb+group+d+2018+notification+pdf PDF link annotation
    • http://kimhoatra.com/upload/fckimagesfile/12102700968.pdfIn PDF document text
    • http://www.psoevalledeabdalajis.es/ckfinder/userfiles/files/69417623415.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/ddedfc4f857d932bbf6f99cce3947d25/23501037641.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/3lc24b7ovg8rht9gb0mvc8i8ql/guzuwoxat.pdfIn PDF document text
    • http://dragonspond.com/uploads/files/belidirur.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/95943240774.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/91084166934.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16100d4c9ea9a3---14629827636.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f56e8b1fe---jumexuf.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/92ca41e564087976ad7330d13dc08358/72842106524.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/genemikidujo.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16117037677c22---lagumorizuf.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/58851467638.pdfIn PDF document text
    • http://cortabellanews.com/userimages/92541989287.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/6t2pgl301ir4ev2fq0m3g220og/18575441376.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/f07bde32640362a237c803c933326844/90296958155.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086f1fb5f40f---weravowiwokomagudusik.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0556414d8---porabutevakatodepofutodif.pdfIn PDF document text
    • http://khaskhaan.mn/uploads/userfiles/files/92293091994.pdfIn PDF document text
    • http://nicenpos.com/userData/board/file/dogodefifa.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-7-24/20210724181000495931.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/18480715644.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/bekivagibufujurapu.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d046075e6c---6939902589.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/xumob.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A3 11236 bytes
SHA-256: 01aa8570884c42f2af5453f9ffb72211b7f87ace67b06c11f76de75d97395f0a
font_01_sfnt_off0000eaba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 19712 bytes
SHA-256: 93fa9b75a253b57cd770d730820de0e8aa1f88ba21bd20f9460f86ef00f6ad7f
font_02_sfnt_off00011bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000133dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DD 1936 bytes
SHA-256: 581ee6410b39f3fc3c0b7eee44a1f688a16d32601ddb4ff915e7da4a385d4a1a
font_04_sfnt_off00013cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD0 16192 bytes
SHA-256: 126aabc53b187bc4421529373f04e2f66a11804dfeaeb35cb650b132d56c1dbd

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