Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1f808f556cad43…

MALICIOUS

PDF

89.2 KB Created: 2021-01-26 16:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 3544ec7c421cad9d73d31bceb27f25b8 SHA-1: 88ffda83e1c96f1f5083ae29041362f68fc73e20 SHA-256: 7a1f808f556cad43e16fa5d57f9752a43d71805b3b1d4bf79c3c43bd9da61190
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or SEO manipulation scheme. The embedded URLs and the PDF structure strongly indicate an attempt to redirect users to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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://leonvi.ru/123?utm_term=d%2527evelyn+high+school+cross+country PDF link annotation
    • https://cdn.sqhk.co/talidapato/Xx4PShj/marvel_pinball_free_download_android.pdfIn PDF document text
    • http://idealslimitaly-official.site/64768330718wy5lg.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/W3NbVk3/95836409577.pdfIn PDF document text
    • https://cdn.sqhk.co/lirerafi/ifsiaby/xijebevaju.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jiijL1C/fisixemukasuvexafufu.pdfIn PDF document text
    • http://interstart.online/telugu_private_love_ringtones_download_20202mwp6.pdfIn PDF document text
    • https://tezilejesitox.weebly.com/uploads/1/3/1/1/131163634/vigewapejuxabiv-zatusinutebi.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/ifigJPr/70_s_80_s_music_radio_stations.pdfIn PDF document text
    • https://cdn.sqhk.co/nevupediwix/JEvHiij/fazojejomilamomowodipux.pdfIn PDF document text
    • https://wolunogejafijut.weebly.com/uploads/1/3/4/6/134649672/kolaloxirefu_nazazuxovot_tonawefodaxu_pexenijarop.pdfIn PDF document text
    • https://daxixulo.weebly.com/uploads/1/3/1/0/131070202/3468564.pdfIn PDF document text
    • http://abanca-electronica.com/mystic_valenti_fordzl2oc.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/2Zuhjjj/91778911102.pdfIn PDF document text
    • https://cdn.sqhk.co/kesokirow/Kphd7gi/gevamagobilinilatiri.pdfIn PDF document text
    • https://fagutefoxod.weebly.com/uploads/1/3/4/2/134235025/50740a11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00011ddc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11DDC 24668 bytes
SHA-256: 0102d6c454ded6029954e5f8c5ec552cf7cf670e20a99f4bfb07c976887a3a70
font_00_sfnt_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 4928 bytes
SHA-256: cb5f4c2a113a614bddede657afcb981192244525801a58e2c9a6ae2fb7c889ce
font_01_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 10772 bytes
SHA-256: 0526db0dd8c9a5fd201f39f8c74e17c21688d771e1d825e43ee8773447f3afd3
font_03_sfnt_off000148e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148E3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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