Malicious PDF — malware analysis report

Static analysis result for SHA-256 317b2448d7199c92…

MALICIOUS

PDF

73.8 KB Created: 2021-09-20 00:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: ac26183cd13e72793f965d2921a179cc SHA-1: 0646327d5d526aa44e41a2b468acde7d60e9d3fe SHA-256: 317b2448d7199c927fb4456f2041d1d43bfca508fdc361ac596d62a981061f77
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://crewmak.ru/uplcv?utm_term=watch+how+to+be+single+putlocker PDF link annotation
    • http://suachuamaydemtien.biz/userfiles/file/99721161528.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134222c9523d---tunepoxelumokedoxajinemo.pdfIn PDF document text
    • http://motolargo.pl/userfiles/file/39294388102.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/45172704193.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ebb338e1c---21482969735.pdfIn PDF document text
    • http://actybrain-consult.com/Upload/files/feratu.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/gerikumigitotu.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/gisupijewedisugola.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/niwitu.pdfIn PDF document text
    • https://eurouniversal.eu/ckfinder/userfiles/files/kezomawuwuvopafixi.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a0a31ef5f38b1998ca64a788d9285c42/28433118297.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/bitof.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/73321608739.pdfIn PDF document text
    • http://snft.ro/media/file/bivoxasoxebor.pdfIn PDF document text
    • https://deltaguvenlik.net/userfiles/file/13918815587.pdfIn PDF document text
    • http://cyc.cz/pictures/clanky/files/samipubonidixen.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/22171848214.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/49999879856.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/35589579299.pdfIn PDF document text
    • http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/lewafuj.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/13021098404.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/32495962796.pdfIn PDF document text
    • https://clicksnepal.grnca.org/img/files/files/12052082436.pdfIn PDF document text
    • http://asustainable.com/global/file/juziriraxasopekod.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/tarosatanixubolalekotog.pdfIn PDF document text
    • http://medtravel.lv/images/hand_uploaded/files/16888323228.pdfIn PDF document text
    • http://cocoal.com/uploads/file/rorakagaderulokoduwinefe.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/wiseniwakoxuwemasuwof.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_off0000bf35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74C 11064 bytes
SHA-256: 22d81cf2f26584c339529cd711e4d72ffdbd4b53ab9f0fafbdcde7454d85139d
font_02_sfnt_off0000f0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E2 15584 bytes
SHA-256: 18b68b15e6628e73ea7c76e4e53153bf0d1b536844d2e631c086b6d6758c74c9