Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b18ace057bde3f7…

MALICIOUS

PDF

88.4 KB Created: 2021-08-01 10:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 126d803306adf274eee1f8aeded5a2cf SHA-1: 402c2315447756424c220f92db60cf4a196f2f6d SHA-256: 1b18ace057bde3f7368b1a6f1c2cac8f79ca61527b6f7d6e4843c0bfb81d1a31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to various domains, many of which are hosted on compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of many external URIs suggest the document's primary purpose is to act as a link farm, likely to distribute phishing content or further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://allytemp.ru/uplcv?utm_term=what+can+i+write+in+my+nephews+16th+birthday+card PDF link annotation
    • http://stananddiane.com/clients/6/67/672a2699e369d648dd23e03de9deda78/File/sivosibisepezizatidon.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/53259993551.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/ratazibasogexajotije.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/nojozuwalegefevedapoliz.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/fkkvs665t85rlemlc7pjh8agjp/giwunawitolovabakenak.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160714a133977b---45101196602.pdfIn PDF document text
    • http://tillmanfamilyreunion.com/clients/b/b7/b7385abc5988d1ee605fea7695e3d00e/File/vazaxi.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/tglunj6247uori35gj0qraor8r/59102463024.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7faa16497---vulofug.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/25492165416.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/49940874746.pdfIn PDF document text
    • https://paperland.bg/uploads/file/70862953850.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/93610388885.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32ce76fab8---47504814632.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/0acc309df53ff2eb5a23ad02feeb3314/48362970328.pdfIn PDF document text
    • http://feriaalainversa.com/uploaded/files/bebimufosanotixew.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/99014902803.pdfIn PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/nusederug.pdfIn PDF document text
    • http://brucemsmithlaw.com/clients/e/e2/e252bfde01ef004f685a9648d307a4b9/File/tivezumuza.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160f146620fb4a---xulewubikuvewuki.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/2732399832.pdfIn PDF document text
    • https://iwnta.com/userfiles/file/52503346306.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/zozobubegudiwaselojovew.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_off0000f518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 11168 bytes
SHA-256: 6d7967ab040a119dde577e91cccd8927668045a9e7e18435a25d39ad4989d67f
font_02_sfnt_off00012703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12703 17164 bytes
SHA-256: be0d4c9a1abb4adee697774d0174e4651d1c92158c723d317c0e5a7c4e2649e4

Open this report in the interactive analyzer, or submit your own file for analysis.