Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2ec053d14a14b7b…

MALICIOUS

PDF

85.6 KB Created: 2021-07-15 23:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec73f015d620ddb868ece9679c5f3a63 SHA-1: 7f020bcb465313f4c0611bcc6ca03df7905639bf SHA-256: e2ec053d14a14b7bd5dd3e291a77c9e59af1ce423ba5913efaf3707e3b3869dc
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to various websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, suggesting it's not intended for direct user interaction but rather to host malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=yucatan+crater+from+space
    • http://co-wemart.com/careeruserfiles/file/segoxapuru.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/doh4se02c3i2h2n514r8ma26fk/48105631852.pdf
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b7c51f256---60198827783.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/288b1dbabc4b6bdb1a9c48ca0d67d2f1/66490449998.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c6b688597---duziguzifadepagotan.pdf
    • https://marjoyunlar.com/calisma2/files/uploads/palanitulo.pdf
    • https://investmentskillsgroup.com/images/userfiles/file/26124377704.pdf
    • http://www.azurwelcomeservices.com/userfiles/file/82927754726.pdf
    • https://seerupit.dk/assens/file/megiwesunozufewedozal.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc4d774914---vikusoxabopokavirijozo.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/38f4554d133bb15537a288bcf1bd3d92/13491823180.pdf
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1f5b73431c432f61b4bbdfdf7ce4d4dc/85970884827.pdf
    • http://matthewsmillsreunion.com/clients/c/c7/c7863f7b93cb17915b2a89d887155530/File/57772986065.pdf
    • http://flygarfield.net/userfiles/file/xezaxarixametiwinurite.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c747f30b7bc---filibaki.pdf
    • http://farmaciafasolis.eu/userfiles/files/jiditijaxixisipevoke.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/erlusp7g7rn42pa8a9dqff1i4h/1062377583.pdf
    • http://wamer.org/userfiles/file/lanazolepizonowowaw.pdf
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/85676499441.pdf
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/58520510939.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/f58d9e03928308ff1c4a7f2955910dba/rirosiginagogimefegeju.pdf
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/v677e6987l190c5r9jhv0neen5/15202887417.pdf
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16085a913753e9---jufeguf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e707.bin
0d478149eeb45edbf2bc10e45e9956429d94e167980033328f2d926af0ae3507
pdf-font-stream PDF embedded font (sfnt) at offset 0xE707 10584 bytes
font_01_sfnt_off0000ff41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF41 16792 bytes
font_02_sfnt_off00011753.bin
15d7cfeb44e37a3ce00b4afeff9f2b618004cc3ba013c832c2eb685e7b12c744
pdf-font-stream PDF embedded font (sfnt) at offset 0x11753 18500 bytes