Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e5d230a7682aac…

MALICIOUS

PDF

79.0 KB Created: 2021-02-19 23:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0078ad7f9bd7d30ce411f4205ea9f7b2 SHA-1: b791daf3522aa0241568243dc16b7eef79ff49e7 SHA-256: e3e5d230a7682aac9cfd5bbd5675d1f03f9657b9145e572de3ab31163287a9bf
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier. It contains numerous embedded links, many of which point to disposable hosting or known malicious redirectors, suggesting a phishing or scam attempt. The document body appears to be obfuscated or corrupted, but the presence of embedded URLs and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly indicate an attempt to redirect the user to malicious content.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/123?utm_term=the+adventures+of+sherlock+holmes+book+age+rating In PDF document text
    • http://zifosazoniduve.22web.org/are_there_any_stories_of_jesus_as_a_child_in_the_bible.pdfIn PDF document text
    • https://mabunamu.weebly.com/uploads/1/3/4/9/134902385/rikajajejoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_6028884605cda.pdfIn PDF document text
    • https://pagowabelada.weebly.com/uploads/1/3/0/8/130874520/1641887.pdfIn PDF document text
    • https://tazegeravi.weebly.com/uploads/1/3/5/3/135390309/wurefigejijipe_kebinakije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_600fd7b69477f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_6009b9e16445f.pdfIn PDF document text
    • http://fegovoze.22web.org/nkjv_bible_free_for_windows_7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496586/normal_5fcc52ba27f67.pdfIn PDF document text
    • http://dorisebadun.22web.org/amma_feeling_songs_video.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fcbf24fba1bd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/vakexotav.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/51673675479.pdfIn PDF document text
    • http://febarufowit.epizy.com/wetawarozopotugijesoladov.pdfIn PDF document text
    • http://joluvolob.epizy.com/72548467703.pdfIn PDF document text
    • http://kirutitas.epizy.com/91292081110.pdfIn PDF document text
    • http://gogewarixisude.epizy.com/free_printable_batgirl_mask_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/pool_car_log_book_template.pdfIn PDF document text
    • http://lajirobodogew.epizy.com/exercicios_sobre_analise_combinatoria.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_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 5648 bytes
SHA-256: 2e7f5997145cb6af4a0e730fce8c4604b9904cbcc208cdcbd899a2afd8d1982e
font_01_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 10324 bytes
SHA-256: 296dd3dff1ee5ed16048c56097b0c581df98f90d66503f7c801524d8c0a84f16

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