Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b0e4e8f235bd35…

MALICIOUS

PDF

86.9 KB Created: 2021-04-09 04:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 00d2c069749c154e09441a7f26b855ab SHA-1: c3c4b24c734776534791f435052b175db19b6ca0 SHA-256: 00b0e4e8f235bd35d45bdf7bed316fa2f44653a8dace10d762119c528738d3e2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=don%2527t+shoot+the+dog+epub PDF link annotation
    • https://terabuzaxora.weebly.com/uploads/1/3/0/8/130814115/dijaxosesab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_601fc5b508b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485807/normal_60604da827f76.pdfIn PDF document text
    • http://sununetapa.22web.org/saxafuxewoden.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5ff384ea34e9e.pdfIn PDF document text
    • https://dezilitew.weebly.com/uploads/1/3/4/7/134728488/5065186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499299/normal_5fe4dc5b9bd8e.pdfIn PDF document text
    • https://vazexisosumufil.weebly.com/uploads/1/3/4/4/134465451/pemopunejede.pdfIn PDF document text
    • http://jijukilodo.iblogger.org/chemistry_notes_for_bsc_3rd_year.pdfIn PDF document text
    • http://wibofot.22web.org/anandam_telugu_movie_songs_free_320kbps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_6033f052ca3b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxopejukovadej.epizy.com/wabenogojikexaku.pdfIn PDF document text
    • http://gizadopozi.epizy.com/radio_telemetry_system.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/3845591639.pdfIn PDF document text
    • http://wetowudokik.epizy.com/alb_sport_v3_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/bts_idol_mv_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/2003_chevy_tracker_zr2_owners_manual.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/9625970291.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/lonetuju.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/algebra_ii_workbook_for_dummies.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_off00011610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11610 5056 bytes
SHA-256: 8c8866a71bfca36a179f848ac643f33cf827bbc1bca7bdc937b204deb5136ccc
font_01_sfnt_off00012749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 11368 bytes
SHA-256: ff226bf5d6522bb9a9a66f2b4264927707658cda79fd31a967d90b38255f3493

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