Malicious PDF — malware analysis report

Static analysis result for SHA-256 148149f5a30c0de8…

MALICIOUS

PDF

84.0 KB Created: 2021-09-22 13:08:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: caef6f5966ab93b4b7f1ac6b87790719 SHA-1: a64a0b3353b5581dbb20aebf72bcc71fe3276003 SHA-256: 148149f5a30c0de89c8c47c0ff394ab36a80f5a9ee3839c9f59926261d74faf5
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm designed to redirect users to various PDF files hosted on potentially compromised websites, masquerading as a download for 'wwe 2k20 download mobile'. The presence of multiple external URIs and link farm heuristics strongly suggests a social engineering attempt to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://thietbixanh.net/uploads/files/89658390938.pdf In PDF document text
    • http://dr-onesrl.com/userfiles/files/91786904456.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141d7a035fb6---6918117468.pdfIn PDF document text
    • https://fratellifurloni.it/file/mekoxepoxuza.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/gasovexosevalonivareno.pdfIn PDF document text
    • http://studiolorenzoni.eu/userfiles/files/mewofe.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bopizafumuxawazesizuw.pdfIn PDF document text
    • http://ingore.cn/upload/files/31875901189.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/nowadipejopuxesiz.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/taturodagasogomavesapur.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16148957f9887a---50017518679.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/lojevuzavimolebotap.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/seworakogotavuxivepexoz.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16141bc44d0c8f---71085858493.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/v10ccatfmc3763j4vf1am49s40/safamu.pdfIn PDF document text
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/48682036161.pdfIn PDF document text
    • http://autoklej.pl/app/webroot/media/files/63737286706.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/mepineletidugawunesef.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/648ca5848db99e4e59983a71cfaf6651/25908844452.pdfIn PDF document text
    • http://net-work.cz/data/file/kuwukiwor.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/zenulavowakerumiditono.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/bd2ca59f38fa2138d092629a9a93ab67/70581477074.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=wwe+2k20+download+mobilePDF link annotation
    • 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_off0000e48c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48C 17500 bytes
SHA-256: 9690fc74fd2e28bbbf43e6eceeb8ef1a0a14d77bffd22fd39ac491b1b9a9cfe7
font_01_sfnt_off0001121c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A33 10596 bytes
SHA-256: 3a2278b265758cf0b68ad500db189688f675cfb2d7fd52cc07ba74a5126e1ef5