Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8836665edfc3ec…

MALICIOUS

PDF

75.5 KB Created: 2021-03-01 00:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 18cb76c4a8bc8a0e8f109683f6c0f5e2 SHA-1: 2eeeda7e9d77002ddea2f97d7136a077ec070807 SHA-256: 1b8836665edfc3ecdb0b19e73e12ea0dd1371f39c9f154c521c1ba9e01f54fa4
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to financial events, likely as a lure to attract clicks on the embedded URLs.

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
  • 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://lozipotod.ru/strik?utm_term=stock+market+crash+1929+president PDF link annotation
    • http://tanemazijafawin.medianewsonline.com/john_maxwell_certification.pdfIn PDF document text
    • http://glossywp.online/20130580584h0geq.pdfIn PDF document text
    • http://tersq.space/graco_nautilus_65_lx_3-in-1_manuall2yah.pdfIn PDF document text
    • http://extrameets.fun/zetavutqgvb0.pdfIn PDF document text
    • http://detonic-italia.website/anything_under_the_sun_questions_with_answerscab3f.pdfIn PDF document text
    • http://wabitolukarile.22web.org/woxaxisa.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/1434400566.pdfIn PDF document text
    • http://justamorem.com/ls_command_in_linux_with_examplesrg1h1.pdfIn PDF document text
    • http://italiahot.fun/774246028392u7yq.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/60421306250.pdfIn PDF document text
    • http://5coupons.info/zekoxuleseroditovw6bxm.pdfIn PDF document text
    • http://zomoxesami.22web.org/ridesiwe.pdfIn PDF document text
    • http://gebajajax.22web.org/zapalokefupadufunozoge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xologikaju.atwebpages.com/asi_hablaba_zaratustra_resumen_por_capitulos.pdfIn PDF document text
    • http://wimixuv.epizy.com/labeninulutixojojexumelu.pdfIn PDF document text
    • http://bixasejefo.rf.gd/brahma_songs_starmusiq.pdfIn PDF document text
    • http://jeborawaleko.atwebpages.com/38575022348.pdfIn PDF document text
    • http://tifavamifikas.myartsonline.com/20471122643.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_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 5788 bytes
SHA-256: 046853772bb518874b7cb4b91ab37cd7ddd98d991b388008218942a56fac598e
font_01_sfnt_off0000fac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC0 11268 bytes
SHA-256: 7d4240bea33612f20456639c714ba2ac8ab6ee3da87c7a8b463689d14d119045

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