Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a2e3ab8035baaa…

MALICIOUS

PDF

69.9 KB Created: 2021-02-14 21:37:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6547d85d564f870d869014211b947be5 SHA-1: a5c0003550ae83cbdeb71976bfad284495140159 SHA-256: 68a2e3ab8035baaa1ba6aef3c4b92594665a4622d5f0e5e1bdf5f3c6df673e19
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'blue pitbulls for sale in indiana', suggesting a lure to disguise the malicious links. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or redirection to malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=blue+pitbulls+for+sale+in+indiana In PDF document text
    • https://static.s123-cdn-static.com/uploads/4375515/normal_5fec35554b679.pdfIn PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/xiseposifigepalugobu.pdfIn PDF document text
    • https://dotanivim.weebly.com/uploads/1/3/4/7/134705276/kotis_dudumefisog_gubesogulixul_pijuzibele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ffa86ee720bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366662/normal_5fd3b80eca3f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484633/normal_5fff24cbd7325.pdfIn PDF document text
    • http://youralteragoods.com/rixomowumutab9irz8.pdfIn PDF document text
    • http://onesmall.space/bozinumogisameriluwu7ph.pdfIn PDF document text
    • https://cdn.sqhk.co/nojumuku/8ieXl8b/jirafoxut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekujekodabudu.epizy.com/27021958769.pdfIn PDF document text
    • http://favagapararo.epizy.com/javascript_button_don_t_submit_form.pdfIn PDF document text
    • http://kukadafimi.rf.gd/ben_10_omniverse_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/review_berocca_performance.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_off0000d484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD484 5224 bytes
SHA-256: 8dcc41b01bb473d48fd630fd4ac6596ebdd2729d69785355e30ada1e5763302c
font_01_sfnt_off0000e64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64D 10684 bytes
SHA-256: 3897529a059670557652bd9a6914e38fd2f0f8689ec6185f56b66db7f22b116e

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