Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ea890bfe60b1e1…

MALICIOUS

PDF

73.4 KB Created: 2021-02-15 10:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4f2bea1192fe64bd595b15ebeecb5707 SHA-1: ac5f089d9fd8ca7646e636525732c4bf9294ce0c SHA-256: b6ea890bfe60b1e12f33c6a773ec7fcd0c62c0d512ec520dd388b988eceed2fb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/aws?utm_term=languidez+de+alfonsina+storni PDF link annotation
    • https://suzeziji.weebly.com/uploads/1/3/0/7/130739492/rasisigaxe.pdfIn PDF document text
    • https://cdn.sqhk.co/pakebisas/UjePPlB/hh_obd_bluetooth_diagnostic_code_reader.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/fQidgjo/68138718341.pdfIn PDF document text
    • https://xabisipejerifo.weebly.com/uploads/1/3/4/6/134634854/d1e220dabacb064.pdfIn PDF document text
    • https://denudosija.weebly.com/uploads/1/3/4/0/134017010/47520d.pdfIn PDF document text
    • https://muxetomanudone.weebly.com/uploads/1/3/1/4/131406273/wogazomolew-kutinimeletitu-tutovi-wamemanifawub.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/Nhajevu/lonuzawovekidak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393034/normal_5ffaafcfde0b8.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/e3jf0qu/ice_brent_crude_oil_price_live.pdfIn PDF document text
    • http://discout.online/39351470824ciz6l.pdfIn PDF document text
    • http://barashik.space/gy-_30_bh1750fvi_datasheetnj9f8.pdfIn PDF document text
    • http://geekcods.com/crystal_report_runtime_13_64_bitqkmvg.pdfIn PDF document text
    • https://datuzela.weebly.com/uploads/1/3/4/1/134109276/7e8089acc2f.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/buvut_kelovozix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_601a824e1f09e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425929/normal_600308e07de26.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/liluvad/architectural_technician_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/basketball_stars_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/puloze.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/28913376657.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD171 4948 bytes
SHA-256: 6cc5f179778a89e63b723d7a9963b25e6aa9e3f14e3ae81a45c858ee58401198
font_01_sfnt_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 12164 bytes
SHA-256: 2472dfb5b1148c847d8c171a5743676180890eec8f2083d32168a92d44b62213
font_02_sfnt_off00010a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A24 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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