Malicious PDF — malware analysis report

Static analysis result for SHA-256 1963530930a3f4c3…

MALICIOUS

PDF

77.7 KB Created: 2021-06-14 13:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3638440158eb50a0b91d5d679457c3a6 SHA-1: 8a3b4796416ea118966898c927b6ba4befe4b5ca SHA-256: 1963530930a3f4c36937083ca2391e3bdb558b1058c00625c6495034755531fa
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document 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 pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains metadata related to PDF generation and a URL that appears to be a lure for figurative language information, likely a pretext for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 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://drafthe.ru/pbw?utm_term=what+are+the+different+types+of+figurative+language PDF link annotation
    • https://pevikotorukob.weebly.com/uploads/1/3/4/7/134708951/filofaj-vumajabi.pdfIn PDF document text
    • https://kufurana.weebly.com/uploads/1/3/1/4/131482954/8256473.pdfIn PDF document text
    • https://jepololazatozuj.weebly.com/uploads/1/3/4/6/134601538/ginalurami-wojidaxi-zuretisewaba.pdfIn PDF document text
    • https://famixupeb.weebly.com/uploads/1/3/4/7/134733803/898176.pdfIn PDF document text
    • https://lawawigulodupaw.weebly.com/uploads/1/3/7/5/137502749/937805.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/lesixe-zabuse.pdfIn PDF document text
    • https://tofeniva.weebly.com/uploads/1/3/4/6/134625175/tamitovokureladiba.pdfIn PDF document text
    • https://luwomobesu.weebly.com/uploads/1/3/4/2/134235002/sanubewedu-mupafaxedawuxa.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
    • http://sikawejedi.pbworks.com/f/80627572644.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/w/file/fetch/144992313/app_tv_play_geh_apk.pdfIn PDF document text
    • http://pebokuvog.pbworks.com/f/analytical_chemistry_fundamentals.pdfIn PDF document text
    • http://sowenux.pbworks.com/w/file/fetch/145235511/kewugivaxowapid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a46312a2-d68c-4055-a785-571430a05766/boss_me_50b_loop_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3973ecd3-cec5-41c5-8375-c7bb922be46c/frases_del_libro_historia_universal_de_la_infamia.pdfIn PDF document text
    • http://sokulus.pbworks.com/w/file/fetch/144476925/free_new_bollywood_full_movies_2018_download.pdfIn PDF document text
    • http://makifin.pbworks.com/f/kulelopusiga.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/w/file/fetch/144415695/how_to_gain_weight_in_a_week.pdfIn PDF document text
    • http://vawijoj.pbworks.com/w/file/fetch/145160232/callan_method_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff056def-b772-4f03-8ad9-27d7999d4cdd/bulldog_vaults_customer_service.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22a305f-3d61-4a30-b2f3-28db2d9ae88b/76196633710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a491715-40cc-4820-bf64-73e9b97c1c5c/domififusupijaluxewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5824c810-a920-4b2e-b58a-e8b4dba16b24/8712883563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eeec3ca-c65a-4b90-8e88-f916dca5030e/refenesovi.pdfIn PDF document text
    • http://bibosopimugo.pbworks.com/f/what_if_my_carry_on_is_too_big.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39D 5360 bytes
SHA-256: 987938dcb1830a6a578d2e75575eaecdff505ffccdc6dff9e89aa010d480c858
font_01_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 10824 bytes
SHA-256: 80e58fe2153af80ad5fb0cb342b085062d63242ff046f9a624bb3e99adbd07e1
font_02_sfnt_off00011aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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