Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f0c5dc5385c86e…

MALICIOUS

PDF

83.1 KB Created: 2021-07-02 08:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86a9a9fa3b3628139fc491dbea27e8e1 SHA-1: 61e9957700be358bcc10d79fd2eddb71c708a42f SHA-256: 95f0c5dc5385c86e5a756a2290f47d02bd9edd5dba29fb0f94cf0a2f5171af1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns suggest it's designed to redirect users to malicious content.

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://laborke.ru/uplcv?utm_term=mmhg+conversion+to+atm
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/7fc6f45c9bfde6db40d06a73b64f9889/lavuzosijutenu.pdf
    • https://vettercycles.ch/userfiles/files/87510031206.pdf
    • https://transmar.biz/ckfinder/userfiles/files/rivijegogebinas.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/69658385245.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160705a4dcc96d---84050423786.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/psnu3ofqm36q21pfr3nu1et2u6/54932608740.pdf
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/e2f131d592996ac8ef1a57d0f9b1f69f/99833240752.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ba66c376e05---xotuzovoku.pdf
    • https://sharadsangam.org/UserFilesTwo/file/nefawu.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ca5162300---repinodozukoruguramife.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf4794b6f01---nakidanofupulajovile.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160967da74175b---wepebovilojatewapirera.pdf
    • http://evpltravel.com/xv_image/file/55457305329.pdf
    • http://bogelaipigeon.com/upload/file/67855911861.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16081ff47de3ce---34701583196.pdf
    • https://bhsbeacon.com/FCKeditor/file/4312412337.pdf
    • http://guerrazzi.info/userfiles/files/vaxexuwodi.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/1b61b5ea17e5d97e1812d69c624e10fe/topoxisedesax.pdf
    • http://asianmosaicnyc.com/userfiles/file/94743028764.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e16548086---37681253883.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/f32e33031d8d28b78e9717ddd840e74d/62664750622.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607feaa5d2e8d---wivurigezujiminasexonipi.pdf
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/1d7c930734c00384bf1f1559ec01bcb4/mimibakafuvejedun.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_off0000e232.bin
6253804160a1ac60c00ea31aedd64375308488dd4392dc415d2444beda6f65bd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE232 10692 bytes
font_01_sfnt_off0000faa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 16792 bytes
font_02_sfnt_off000112b2.bin
dd999d17263682932f38e593e254cbd0474845ba0515dd40281c3f309939db15
pdf-font-stream PDF embedded font (sfnt) at offset 0x112B2 17076 bytes