Malicious PDF — malware analysis report

Static analysis result for SHA-256 888972e0fc83a8d1…

MALICIOUS

PDF

82.2 KB Created: 2021-04-01 10:30:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1f6f4087d6f4442b8090608d2b367d4c SHA-1: 862409eff167c521d97aaeac2429f8064caebeaa SHA-256: 888972e0fc83a8d1b4e972de9788e45270a38d1f6136cdc0c9a3a902b82967be
156 Risk Score

Malware Insights

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

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 0.9993

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/wix?keyword=descargar+whatsapp+plus+reborn+apk PDF link annotation
    • https://cdn.sqhk.co/vimewiki/yuvp9id/zewirowapumipigotavosaje.pdfIn PDF document text
    • https://cdn.sqhk.co/keridola/Zie5H1O/township_game_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/boremagu/fMLhgTI/lakowuwo.pdfIn PDF document text
    • https://cdn.sqhk.co/xalazuwumi/FMjijjx/55231340537.pdfIn PDF document text
    • https://cdn.sqhk.co/ketegobuto/87nONWC/highway_traffic_rider_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/mekizojo/jq0heZg/16776431519.pdfIn PDF document text
    • https://cdn.sqhk.co/diwiporeb/jdiieQl/82102766704.pdfIn PDF document text
    • https://cdn.sqhk.co/delotijuw/NaifNpm/kakegatepekigag.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/retobifulipo/digital_clock_worksheets_ks2.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/bobipavamoda.pdfIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_0f7960629b6c426eb34624949cc55b33.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/epsxe_emulator_for_android_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/how_long_is_navy_boot_camp_in_chicago.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/21715101039.pdfIn PDF document text
    • https://s3.amazonaws.com/firudegix/24676098002.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/tajidutulisovixi.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/sajixawexojixodod.pdfIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_9bc47e3dbb914e0f806d227ff6f57945.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liwafo/answerability_legal_definition.pdfIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_bb578deeb4da4e2db520edfb00c0f218.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_05ddca86dac744c592b1cfd7145463f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizaxo/honey_badger_honeyguide.pdfIn PDF document text
    • https://87164119-88a6-4d6d-a72f-b109cf2d88b9.filesusr.com/ugd/bd0a66_15a879989cb24199974f1f759a59ec21.pdf?index=trueIn 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_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 5488 bytes
SHA-256: 735068a2512b001997704b600dfeb90fef2dd027211a7047b68f9345db19856a
font_01_sfnt_off0001141b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1141B 12568 bytes
SHA-256: 0248be83cdfbb82b1ecae81a87a27bbf0962de864eb3db58e3892fa32fbe2367

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