Malicious PDF — malware analysis report

Static analysis result for SHA-256 af3edf3b6d779a3f…

MALICIOUS

PDF

74.0 KB Created: 2021-06-01 12:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 146b65947bebf9df9c01b9e68a8f8cc2 SHA-1: defb103e9b57f86326154a7da001e4fbdff53c0d SHA-256: af3edf3b6d779a3f6f7a43a64b1f14d8497c3f4aa4f13c1bff9a2fe52319cfb5
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or redirection mechanism. The primary external URI points to a URL that appears to be a lure for movie song downloads, likely intended to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/pbw?utm_term=nani%2527s+gang+leader+telugu+movie+songs+free+download+naa
    • https://cdn-cms.f-static.net/uploads/4391920/normal_5fe67861c45eb.pdf
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6047e1b5a7124.pdf
    • https://cdn-cms.f-static.net/uploads/4459624/normal_6043e97c46893.pdf
    • https://static.s123-cdn-static.com/uploads/4365594/normal_5fcbd7957c418.pdf
    • https://raguloduw.weebly.com/uploads/1/3/4/0/134041620/tixorav-biwumut.pdf
    • https://tegikalom.weebly.com/uploads/1/3/0/8/130874380/jiteg.pdf
    • https://cdn-cms.f-static.net/uploads/4401983/normal_600c19e6c52e5.pdf
    • https://cdn-cms.f-static.net/uploads/4410433/normal_603dd17b37b84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/818a3e85-799c-426a-9c9b-4221a4963001/dajugozevisadesizurivit.pdf
    • https://uploads.strikinglycdn.com/files/613497ee-19e0-4092-9862-1ee84a898c69/what_are_velocity_and_acceleration.pdf
    • https://uploads.strikinglycdn.com/files/cfae9c63-228d-4ccd-88dd-f4317baf313d/liporozoxasawad.pdf
    • https://uploads.strikinglycdn.com/files/43a4a0b3-3f98-4f7d-bc2d-24b3e382ce81/what_is_the_purpose_of_recycling_program.pdf
    • https://uploads.strikinglycdn.com/files/97316517-962a-4867-85e6-621b132d71d2/45295728076.pdf
    • https://uploads.strikinglycdn.com/files/5e59a0b4-c0ce-426c-b29f-4d5aa99d83b8/song_of_solomon_2_16_meaning.pdf
    • http://giwupiraride.pbworks.com/f/gelewa.pdf
    • http://xorunezagu.pbworks.com/f/tuwixu.pdf
    • https://uploads.strikinglycdn.com/files/46a23aba-252b-4436-814a-21af19e49ef9/30192180941.pdf
    • https://uploads.strikinglycdn.com/files/1d97fee1-a6c7-4755-86c7-c7a1e10d5176/la_casa_de_bernarda_alba_plot_summary.pdf
    • http://mosijiv.pbworks.com/f/kingroot_apk_download_latest_version_2020.pdf
    • http://zezimin.pbworks.com/w/file/fetch/144412827/gekupoki.pdf
    • https://uploads.strikinglycdn.com/files/b3ff938f-bbe5-4bf9-a664-fa74629d7296/olympic_weightlifting_program.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e09b.bin
1e9a61eeb01bb78129a4cb019bf1baeb0248054b94f5915723a0ede3e21978ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xE09B 5380 bytes
font_01_sfnt_off0000f2f7.bin
d7e3883f39ae9fff76caf64766bd4376c56f65d7998af603cdd08530033fd760
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F7 11592 bytes