Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab89d623487eba83…

MALICIOUS

PDF

75.6 KB Created: 2021-06-08 15:28:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: feb06bc5f8a74b271c49555bd998a048 SHA-1: 521370eb0a1a953dfb083e99572056df916827b5 SHA-256: ab89d623487eba835ff9c2b45afc894284498691e36d20fc7668d8fcf64782a6
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with one prominent URL pointing to 'smidgel.ru' and disguised as a movie download link. This heuristic, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. The PDF structure and embedded content indicate it's designed to trick users into visiting a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://smidgel.ru/pbw?utm_term=karakomik+filmler+2+deli+emanet+indir PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4456143/normal_600ff05904cef.pdfIn PDF document text
    • https://gafujewat.weebly.com/uploads/1/3/4/6/134687801/xujabat.pdfIn PDF document text
    • https://rujabeta.weebly.com/uploads/1/3/4/5/134529194/9278189.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367960/normal_5fe186d4a3ec3.pdfIn PDF document text
    • https://losiweso.weebly.com/uploads/1/3/1/3/131380476/d06298a6615b7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_601af3c74e61c.pdfIn PDF document text
    • https://gisijenoxumo.weebly.com/uploads/1/3/1/4/131437849/jemoduxuwibi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jijagenaneke.pbworks.com/w/file/fetch/144841956/advanced_english_speaking_activities.pdfIn PDF document text
    • http://kedajawi.pbworks.com/f/76382598342.pdfIn PDF document text
    • http://xinunubaz.pbworks.com/w/file/fetch/144623295/wedding_ceremony_timeline_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fc5aa0a-9c95-40b9-b324-deca8e114e6f/89494742129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f794974-4023-4a8b-b8b6-f21e23256da5/where_does_that_youtube_family_live.pdfIn PDF document text
    • http://pejuzor.pbworks.com/w/file/fetch/144758820/area_of_triangle_worksheet_6th_grade.pdfIn PDF document text
    • http://kisagew.pbworks.com/f/add_subtract_multiply_and_divide_negative_numbers_worksheet.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144736524/mitujubejep.pdfIn PDF document text
    • http://fuxedemama.pbworks.com/f/38045331147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/432189a6-e015-427c-b10e-3825300a1b39/22188781430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f9e39d-3c06-4a07-afe1-d1153c2c3c9c/babutuxilaw.pdfIn PDF document text
    • http://gexufak.pbworks.com/w/file/fetch/144550848/inogen_one_g3_manual.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/f/pibipog.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_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 5040 bytes
SHA-256: f81ddc0d89dca2b89c85c4ae4e207a4406ba400052f89ce8f52a6046484c43b6
font_01_sfnt_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 14540 bytes
SHA-256: a1cb317b7915f942d8aa10485065be7ed0af8c33f1da70d642d60a7321615272

Open this report in the interactive analyzer, or submit your own file for analysis.