Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef67582fb118c00…

MALICIOUS

PDF

74.1 KB Created: 2021-02-22 06:44:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 02d36616d7db46f37b07bfb439333f1f SHA-1: 499aa7aae4187121fbf3fe0b563de85c19894089 SHA-256: fef67582fb118c00db67280aa4479778ae2d780382ff440be3eaa229e7b2ab9b
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The file contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful sites. The ML classifier also strongly indicated maliciousness, and ClamAV detected it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=world+without+fish+pdf In PDF document text
    • https://vixixufabajuwe.weebly.com/uploads/1/3/1/1/131163632/defufifiro_garabotumexuva_didipexiga.pdfIn PDF document text
    • https://zupuluduwiwafop.weebly.com/uploads/1/3/2/6/132681460/7801291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fda154d4ff1b.pdfIn PDF document text
    • http://zoo-taxi.site/cartoon_oil_paint_photoshop_action_freeiub6x.pdfIn PDF document text
    • https://jokenobijejadur.weebly.com/uploads/1/3/0/8/130873794/5408341.pdfIn PDF document text
    • https://minazunanuvisim.weebly.com/uploads/1/3/4/6/134666394/7069525.pdfIn PDF document text
    • http://bestsalestoday.xyz/best_law_books_in_pakistan1rz8t.pdfIn PDF document text
    • http://jijimaxugixu.22web.org/nevimamoniwefuzedupi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fce0b7062fa2.pdfIn PDF document text
    • http://m-ryanaf.site/fallout_1_gameplay_guideyeelb.pdfIn PDF document text
    • http://rasprodavaika.ru/26225238663r1l38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453553/normal_600f9d733a7b7.pdfIn PDF document text
    • http://salukapebuke.iblogger.org/l_t_financial_report_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413718/normal_5fd1bb66dee7c.pdfIn PDF document text
    • https://vafarisitoguv.weebly.com/uploads/1/3/0/8/130874489/a47124ae67bfad6.pdfIn PDF document text
    • http://jumpfs.space/white_stripes_best_ever_albumskan74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458132/normal_5ff01e03b4017.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jaremov.rf.gd/android_tv_google_photos_screensaver.pdfIn PDF document text
    • http://gasigigi.rf.gd/nigatepiwajoral.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e617.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE617 5024 bytes
SHA-256: 01116eb377dd470a93cfd322480e5b3e8bb15e9735b8d631c96041ec0cb5743e
font_01_sfnt_off0000f746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF746 10656 bytes
SHA-256: e430987cca7f11c7a21c7b73963a38b3fda5d113f59d9238984b95abcddc4b0c

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