Malicious PDF — malware analysis report

Static analysis result for SHA-256 25097c3a34a27a0f…

MALICIOUS

PDF

123.2 KB Created: 2021-03-22 18:05:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2e627b1d67069bccf53626694047fde6 SHA-1: 593a21385527fa4028d5780b4ab43a7a2e2fe03e SHA-256: 25097c3a34a27a0f4e3f7da610505ae7087add1c3630ed3bd1430f9de4ac3af0
166 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://soxebez.ru/strik?utm_term=1998+polaris+sportsman+500+wiring+diagram+pdf PDF link annotation
    • http://fisitupogavi.mypressonline.com/wipogof.pdfIn PDF document text
    • http://securitycheckingbrowservkcom.xyz/36337566936n0l7v.pdfIn PDF document text
    • http://changepass.online/739082873613074a.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/concept_of_skewness_and_kurtosis.pdfIn PDF document text
    • https://cdn.sqhk.co/supibufuk/gcm6pjj/arcsight_esm_console_user_guide.pdfIn PDF document text
    • http://ridaxom.iblogger.org/what_are_the_indo_european_languages.pdfIn PDF document text
    • http://gooddevice-online.com/mental_health_recovery_worksheetsy9mh7.pdfIn PDF document text
    • https://cdn.sqhk.co/tezabulaw/fVoLdic/cartoon_wars_blade_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/gggjqhj/bitiya_rani_song.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/fogibi/jetixuwuxilusizofuvo.pdfIn PDF document text
    • http://pasibujaz.epizy.com/gixoxapawulowod.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/cuanto_equivale_8_centmetros_en_pulgadas.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/bbc_iplayer_app.pdfIn PDF document text
    • http://dezezefisimel.rf.gd/articulatory_phonetics.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/28192058581.pdfIn PDF document text
    • http://bukaduxanob.epizy.com/wudonanik.pdfIn PDF document text
    • http://fixisoluz.rf.gd/bagovuwefix.pdfIn PDF document text
    • http://puzuzebud.epizy.com/10262154489.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/high_priest_judex_guide.pdfIn PDF document text
    • http://gumavefuve.rf.gd/87393438962.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/37334832649.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A281 6028 bytes
SHA-256: 77e849a9357b7028c3cd9082f8b51570b0483c581c39a5b7cc224801a2ed8a99
font_01_sfnt_off0001b703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B703 11712 bytes
SHA-256: aebc9f7bc906c137142524639749e1ee18651b89628ce0284d26dedc265e453d

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