Malicious PDF — malware analysis report

Static analysis result for SHA-256 bceecb426375cbf4…

MALICIOUS

PDF

72.1 KB Created: 2021-06-14 06:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f256a7e458665de5b5faf31ea5429c1 SHA-1: 8960fe171aaf9e2f38ecf553dd05ccb5759a6e0b SHA-256: bceecb426375cbf4814ce6e7bd85af26818525f9fc6abdc031f10e8dd04c46c3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a link farm that uses a 'utm_term' parameter, suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains text related to instrumental music downloads, likely serving as a deceptive pretext to encourage clicks on the malicious links.

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://cructi.ru/pbw?utm_term=baar+baar+din+ye+aaye+instrumental+mp3+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4492546/normal_6065a9144077b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446395/normal_5ffdb5371c6c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_60340e6497f95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465392/normal_606e3da50e188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460708/normal_601123b5f3025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406771/normal_6037f1b760aa7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://tefesabiji.pbworks.com/f/auto_clicker_grifo_automatico_apk_uptodown.pdfIn PDF document text
    • http://lipadune.pbworks.com/w/file/fetch/144875499/never_back_down_3_full_movie_online_free__500__0.02__2.81__Low__11.pdfIn PDF document text
    • http://kobowal.pbworks.com/f/teresenekutakapelij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/632c3217-026a-4bb9-9c23-12c73c8cfa1c/steve_jobs_book_short_summary.pdfIn PDF document text
    • http://metudebebi.pbworks.com/w/file/fetch/144610989/97002814070.pdfIn PDF document text
    • http://jomomaxade.pbworks.com/w/file/fetch/145279404/17584949861.pdfIn PDF document text
    • http://kokoxudalux.pbworks.com/f/voloxejovejijetamoj.pdfIn PDF document text
    • http://kikipudojuzo.pbworks.com/w/file/fetch/144529224/daily_plan_worksheet.pdfIn PDF document text
    • http://palixazoke.pbworks.com/f/the_secret_life_of_walter_mitty_streaming_vost.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/w/file/fetch/144830901/how_to_apply_work_permit_in_canada_from_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa08811-0db1-4b80-b306-d97c93c011ce/xosafarogamezude.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_off0000cd3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3B 5652 bytes
SHA-256: 7276a77afbdbb97c597f2a2136680698dbb4f2c022aa680d3e7741c5f183d79b
font_01_sfnt_off0000e075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE075 10456 bytes
SHA-256: 2f605a91c4344f0574f499a0a7ec7c751345221e7a22eecab8b8e22c734e0668
font_02_sfnt_off00010497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10497 3552 bytes
SHA-256: 7658fdadb4dccd7378216e6ff141ca45ca1fcb40ae7af4b6c57be68325db53f0

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