Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4a150432d50e4a…

MALICIOUS

PDF

91.5 KB Created: 2021-05-15 10:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 67df3d629830f118c7bfba4718a69ae0 SHA-1: 05e5d40563d9c7815b8534c608057a7203a7beb9 SHA-256: 2c4a150432d50e4afb9f6ea7eac5a649114ef3f25ee62a463e0196de15500c78
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to contain text related to a search query, suggesting a phishing or scam attempt. The presence of multiple suspicious URLs, including one that redirects to a PDF hosted on disposable infrastructure, indicates a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • 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://jumiwimov.ru/strik?utm_term=what+is+the+age+limit+to+become+a+navy+seal PDF link annotation
    • http://hotita.space/peposuosmyi.pdfIn PDF document text
    • http://drovazvenigorod.ru/ms_word_templates49wwd.pdfIn PDF document text
    • http://sy0n.icu/23314178857mb7sg.pdfIn PDF document text
    • http://damita.fun/300426862693nra6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5feeee6a82e73.pdfIn PDF document text
    • http://lovechat24.club/9002137508hv3nu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466659/normal_602960ef106d8.pdfIn PDF document text
    • http://leraxedosu.22web.org/le_journal_d_aurlie_laflamme_tome_1_gratuit.pdfIn PDF document text
    • http://helen-art.ru/9599952677975ebt.pdfIn PDF document text
    • http://m-ryanaf.site/fallout_1_gameplay_guideyeelb.pdfIn PDF document text
    • http://springital.fun/narexinomejatojofapopareb3ow9w.pdfIn PDF document text
    • http://lusoxokurutugap.22web.org/full_cast_and_crew_of_fantastic_beasts_and_where_to_find_them.pdfIn PDF document text
    • http://workmonster.net/zusizuzowitazi80qj9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428329/normal_5fdd24db87d4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487197/normal_5fcc2819eb916.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_f16ab84373924ce785ecb377ef8a5133.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wezukep/90609693251.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/create_expenses_spreadsheet_excel.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_bdf11c42242a43d3af940a3b4ada53a2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tobaziw/90536586500.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_f2082847839a4915afcd7ec34bbff6f9.pdf?index=trueIn PDF document text
    • http://walexesanub.rf.gd/vinunarukenadonik.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_6fdcdbaf1b7f49f49672fe0227654ee2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/53161013744.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/gadav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000118d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D8 5220 bytes
SHA-256: 1d1be2c494d389c1a67121ffe3f70e19bad9e41e8d26dce189cf32352b64eb34
font_01_sfnt_off00012a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A86 11740 bytes
SHA-256: a0603c5ab12682181d4fb29b23a2db355a477bf85fe72dd997c5583d3bce56e7
font_02_sfnt_off000151ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151CA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e