Malicious PDF — malware analysis report

Static analysis result for SHA-256 219e1b10407c8985…

MALICIOUS

PDF

59.1 KB Created: 2021-01-10 04:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: aa2f52670bcade43a25470a31b6e4443 SHA-1: 5ef3410343ebc62e5c2d0d151a959dd96f1e70a6 SHA-256: 219e1b10407c8985b1828423eb1fb1d784a4ba3101404c5b7bee62e98435fac4
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic detections indicating it functions as a link farm, directing users to external sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The presence of a URL pointing to 'trafficel.ru' with a 'free sheet music orgel' UTM term indicates a lure to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafficel.ru/aws?utm_term=free+sheet+music+orgel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5fa032994d204.pdfIn PDF document text
    • https://site-1175001.mozfiles.com/files/1175001/era_of_war_mod_apk_unlimited_gold_download.pdfIn PDF document text
    • https://site-1197643.mozfiles.com/files/1197643/mozakogulununoxirorozik.pdfIn PDF document text
    • https://site-1173264.mozfiles.com/files/1173264/descargar_whatsapp_business_plus_apk_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486987/normal_5fc542acb8a94.pdfIn PDF document text
    • https://site-1175914.mozfiles.com/files/1175914/natokekesirajita.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/i7hb6jj/padekujapozitasi.pdfIn PDF document text
    • https://bapumora.weebly.com/uploads/1/3/2/7/132740837/3918988.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/tufipa_wuwebipeluzew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445879/normal_5fdf5d48585af.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/luxelula/a_wrinkle_in_time_movie_script.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/letter_s_practice_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/nepetaxajiz.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_off0000b027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB027 4956 bytes
SHA-256: 5ff5ca49bd4c29bc507a083511180b597a878db2a6ee3166df5f8b2aa6426e29
font_01_sfnt_off0000c0dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DD 9160 bytes
SHA-256: 6939f7f58eb470d2f4ad64d67d5185fb300679b0bd6b147f0422fe52c1a446e0

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