Malicious PDF — malware analysis report

Static analysis result for SHA-256 15001e7441067827…

MALICIOUS

PDF

83.3 KB Created: 2021-09-17 15:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4ee8c14706890c8f45d91988e6d2b9a8 SHA-1: 333b84e664b2d97ad75f54791a8c997134ab8de7 SHA-256: 15001e7441067827b325ec898c2031fe586d973598b6a8bb940e3ebc7c6085f2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://nomylo.ru/uplcv?utm_term=pokemon+ash+gray+for+john+gba+lite PDF link annotation
    • http://humidorio.de/ckfinder/userfiles/files/mesimaxadodifubedapas.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/budenedefesudabozorenu.pdfIn PDF document text
    • http://artkulinaria.pl/sites/default/files/file/redonimoriwaxezejajo.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/62220057564.pdfIn PDF document text
    • https://www.khaosanpools.org/ckfinder/userfiles/files/xeburibuxajuf.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/85228300466.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/xobamiritipa.pdfIn PDF document text
    • http://www.moyekolodin.com/files/88654608523.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613da316ea453---8752678176.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/60901484374.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/29034270713.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/62421036178.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/gabep.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/89saeogkf4ei517iriaf9f73f4/75502425564.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e5074ea1c---dewegasitupilutomozogejum.pdfIn PDF document text
    • https://zibarajabi.com/cache/fck_files/file/fapubuxozigukusejejet.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a0d5d93138---45935834259.pdfIn PDF document text
    • https://www.food-equipment-store.com/fckeditor/uploads/file/3416656176.pdfIn PDF document text
    • http://budropol.de/Upload/file/kezedowefi.pdfIn PDF document text
    • http://teifsepahan.com/files/file/zumepafolakokarolezo.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/patomigomumamadubofifixos.pdfIn PDF document text
    • https://dd-inside.de/userfile/file/77231646601.pdfIn PDF document text
    • http://mdtrend.hu/files/file/jalebuxamupuwemifibuwepu.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_off0000db68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB68 19140 bytes
SHA-256: 1c0d298fd77ad9cddee4b8167d9992d9159e60a1b55806e3159ee1dfa8ec8bd4
font_01_sfnt_off00010d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D69 11140 bytes
SHA-256: 2f0be66aea29c678bb29a89342767764e123b1d27600daff560001cfed1eb177
font_02_sfnt_off0001273f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1273F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1