Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab1ece13ad7861bc…

MALICIOUS

PDF

72.7 KB Created: 2021-06-09 19:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7f5f332f0794d9e7f5476382c7a90918 SHA-1: 202625e4cf87062bf2cdfa5f98da056ccbca2199 SHA-256: ab1ece13ad7861bc9c10be86bfb96fdf35b473acea32b08f5e35895809a3bdf0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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://coretry.ru/pbw?utm_term=robux+unused+codes PDF link annotation
    • https://pivamaxisogen.weebly.com/uploads/1/3/4/4/134481881/dbb17a8f8f3.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/wogunex_zanov_naxibefigise_ragul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446283/normal_5fd72e00143cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372105/normal_5ff17cf95e564.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fe37cd0e8d28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_6052bb07893e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426271/normal_603c2ecd2073a.pdfIn PDF document text
    • https://vemifibu.weebly.com/uploads/1/3/4/3/134354414/9552592.pdfIn PDF document text
    • https://mululugasafes.weebly.com/uploads/1/3/1/6/131636627/8394821.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rumusapage.pbworks.com/w/file/fetch/144875994/1881476025.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/737ddc24-83a3-482f-ba11-e94f454fa4bc/nostradamus_hailed_from_what_country.pdfIn PDF document text
    • http://likanegi.pbworks.com/w/file/fetch/144513153/18529909142.pdfIn PDF document text
    • http://zixereves.pbworks.com/w/file/fetch/144663822/99022487793.pdfIn PDF document text
    • http://rirutatofiv.pbworks.com/w/file/fetch/144877392/xomibadetowukupokewi.pdfIn PDF document text
    • http://jisopubo.pbworks.com/f/45370680974.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b40b23d6-adb8-4dcf-8b9f-1768a668575a/bexebofefi.pdfIn PDF document text
    • http://banusiv.pbworks.com/w/file/fetch/144972861/rise_of_kingdoms_mod_apk_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3acfe4-effa-48c6-bab0-0efeec251e5f/jogos_vorazes_1.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144587367/all_quiet_on_the_western_front_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/830bc49a-3075-4134-8936-70bfdf842b8e/dd_dm_screen_reincarnated.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_off0000e0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E4 4808 bytes
SHA-256: 865e22ee3fb4c57626ab9eb041db4ac84d3aed6d19beffed5a4e37b7c60321a1
font_01_sfnt_off0000f160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF160 10772 bytes
SHA-256: 8c96e0958d0a2ec70374d143624529eba9fdb5740cb4a8d4f25c98f8fd6cf543

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