Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b272aa32976279…

MALICIOUS

PDF

69.1 KB Created: 2021-03-04 02:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5007b2b86eaf7953101314b7af79e259 SHA-1: 1b2692d5b5c261a9ee28512eeefa8a2d02b0f3a8 SHA-256: 82b272aa329762794e68ac11dd374f9eed212ec5c1d599b77af0fee855dced47
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 0.9998

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://xezojetit.ru/infin?keyword=multiplying+and+dividing+rational+numbers+worksheet PDF link annotation
    • https://cdn.sqhk.co/juvanejejuwo/jaijiic/37507697275.pdfIn PDF document text
    • http://gunodopo.22web.org/game_let_s_go_pikachu_android.pdfIn PDF document text
    • http://azorocheat5.xyz/simulacra_and_simulation73itn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487399/normal_601db82c81c5e.pdfIn PDF document text
    • https://cdn.sqhk.co/jigitovewuk/OuijjhK/highway_rider_dj_song.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/ii5Njhr/lizexelivobodeto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_60401e6661a67.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/dhfEJ8Q/22202608866.pdfIn PDF document text
    • http://supsun-aero.com/bioinformatics_analysis_companycwi57.pdfIn PDF document text
    • http://xapizokawe.iblogger.org/vazejazivej.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/gfpiihg/kewipof.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/sogovekevi/sass_grid_template_areas.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/vabezukitajomewagepibes.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/boxukejekeletogejavi.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/rgukt_basar_application_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/44673240158.pdfIn PDF document text
    • http://dakunexafabeve.epizy.com/6718848248.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_off0000cfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD5 5836 bytes
SHA-256: 386475efc449055afc63799d8cf413cf5bbc9035a36f238f0d17a61c9c728c51
font_01_sfnt_off0000e3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 10424 bytes
SHA-256: d1f7fa7286f9c5745267c76181be5f05b9efc4d2bec8a22b5439d695be58765f

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