Malicious PDF — malware analysis report

Static analysis result for SHA-256 0080da252170b2ed…

MALICIOUS

PDF

82.7 KB Created: 2021-01-24 00:12:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d16f5c2e38b8a4cd96dc20e31369509a SHA-1: 20f2026ab16e425ef8cbd3a93d7b9ec7f029774e SHA-256: 0080da252170b2ed506ce4bd2f001ebd9da42321b7d7a5e602098045bffdc542
184 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector and part of a link farm. The document contains numerous embedded URLs pointing to disposable domains, suggesting an attempt to lure users to malicious sites. While no scripts were explicitly extracted, the nature of the embedded links and the ClamAV detection (Pdf.Phishing.Trojan) strongly indicate a phishing or redirection attack, likely delivered as a spearphishing attachment.

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/wb?keyword=que%20es%20lenguaje%20iconico%20ejemplos In PDF document text
    • https://site-1179315.mozfiles.com/files/1179315/inpoly_poly_art_puzzles.pdfIn PDF document text
    • https://site-1179601.mozfiles.com/files/1179601/talking_hello_kitty_toy.pdfIn PDF document text
    • https://site-1178186.mozfiles.com/files/1178186/95638726441.pdfIn PDF document text
    • https://jatupixi.weebly.com/uploads/1/3/1/3/131398141/dufenemevatadefax.pdfIn PDF document text
    • https://site-1180756.mozfiles.com/files/1180756/badaga_beat_songs.pdfIn PDF document text
    • https://site-1171615.mozfiles.com/files/1171615/41390997440.pdfIn PDF document text
    • https://site-1171686.mozfiles.com/files/1171686/fulutogeputozenopagekawol.pdfIn PDF document text
    • https://site-1250920.mozfiles.com/files/1250920/ccna_dumps_2019_free.pdfIn PDF document text
    • https://wikabolodaj.weebly.com/uploads/1/3/4/6/134648749/nagerodon.pdfIn PDF document text
    • https://wukonoru.weebly.com/uploads/1/3/4/4/134441013/cfc39fe3636.pdfIn PDF document text
    • https://borikalubir.weebly.com/uploads/1/3/2/6/132681749/masazutejilin-lenalix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xirixepo/zagavumexopakakesemi.pdfIn PDF document text
    • http://zaxalamel.rf.gd/brawl_stars_mod_apk_file.pdfIn PDF document text
    • http://nupejodolet.epizy.com/nudem.pdfIn PDF document text
    • http://kixomeremit.epizy.com/44085151880.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/38923906413.pdfIn PDF document text
    • http://naditoliwinudev.epizy.com/bizewopavigiz.pdfIn PDF document text
    • http://lubudag.epizy.com/situbav.pdfIn PDF document text
    • http://repuvamiperubo.epizy.com/ssc_result_2017_comilla_board_marksheet.pdfIn PDF document text
    • http://mafevela.rf.gd/date_format_in_php_example_w3schools.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_off000102f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F0 5296 bytes
SHA-256: 039966df4b75b5d585dcdc74a80655c5dbe9582271a0a6d807561aaac3cd891f
font_01_sfnt_off000114ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114EC 11984 bytes
SHA-256: e57387095056ecfb2d0f8918f19b32c5ccd26b8f7491d710a70f4e75c416aeb1

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