Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7118542ce23e6ef…

MALICIOUS

PDF

85.2 KB Created: 2021-09-07 23:00:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8ee588846f5e6d776ca0bb70130fccec SHA-1: c02a95c2ae02dc1379e7ef98b8868b88b60b2a95 SHA-256: e7118542ce23e6ef19ba4e25e6c2dd10d3d8618fa299bc1f31180665a775189c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it's part of a phishing or malware distribution campaign. The file's structure and embedded URLs are consistent with attempts to redirect users to malicious content, likely exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=diarrea+cronica+organica+y+funcional+pdf PDF link annotation
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607120f0d19b1---dirixobonizawadavokezi.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d873979918---38011416118.pdfIn PDF document text
    • http://xn----7sbev0bhje.xn--p1ai/images/news/file/duzomir.pdfIn PDF document text
    • http://restravel.ru/ckfinder/userfiles/files/widuwubadugolopuxezirud.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/d2ee3e5c2e1611bd96d859aeb33664b5/65424432827.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b88594dae7---sisipijodafiwixowe.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609275b37f187---bifiwawinurinukewivawo.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/2d7fch95uromjjn9aid988sjtk/70330807204.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/tajadizojikuno.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16070508d5c01a---62819483195.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/guwixanufirojeworu.pdfIn PDF document text
    • http://fotossc.pl/_files/file/83555552687.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160fe3858ce73f---mukekenadekimokigufoka.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/7eaji8jt62lkjb9lsi6mn2ct3j/11853236825.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/47597723306.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/375k804eokt7c8ddhldb9os35b/65126414644.pdfIn PDF document text
    • https://ikima.fr/uploads/file/87344950321.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e786e6aa8---59015249907.pdfIn PDF document text
    • https://hoongnau.com/upload/files/47671046953.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160985df03f76f---xilalidazo.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/9d667f981def68cb5b18b4fb475b3866/rerilixenelitepagevute.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb6d13eb50---munowapagurepesiv.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/3308020963.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/90544624709.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02521a73e9---19111953192.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_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 10744 bytes
SHA-256: 1a018deea4955d8b0b8d4b717bb5e93a7b4e4f3dc2dd4a36d6edc4ee95342f3d
font_01_sfnt_off0000fdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF9 18408 bytes
SHA-256: a661814e310f49468699d4f7a1528d8ffa695dd26577a5290c7c96d876191765
font_02_sfnt_off00012d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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