Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0532a7d7778c24…

MALICIOUS

PDF

77.3 KB Created: 2021-04-17 07:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 508fb3e6dde57a917606524d91fbb068 SHA-1: ddfa68e73c3214ebd0ef4d921d500a4635ef0fe3 SHA-256: ab0532a7d7778c2493ba771954001d130043f0b7d60d0073d643c8637e0612a8
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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 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://mezovuduw.ru/strik?utm_term=starfinder+flip+mat+pdf+download PDF link annotation
    • https://linowatudevenur.weebly.com/uploads/1/3/4/5/134599813/5924921.pdfIn PDF document text
    • https://nejavedejelije.weebly.com/uploads/1/3/4/3/134336697/gowugofes.pdfIn PDF document text
    • https://pudisemibupar.weebly.com/uploads/1/3/4/0/134096773/guwibuda_mawixorubotum_dimozisas.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/lupudixavibuba.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/silubebebefuju/kaun_banega_crorepati_2019_online_registration_form.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_6e59839136314daaa7fa3e263e4b2706.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1101a6-38c5-4f50-87ec-46ac530628b3/gps_essentials_tutorial.pdfIn PDF document text
    • https://3ff4c494-4984-418a-b709-7a5c611cca0a.filesusr.com/ugd/adbee0_868e4eccafe84c26a918fff02d825f2c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/22b16a31-7882-4196-81af-2015c00e52e4/can_you_use_vinegar_to_clean_a_glass_stove_top.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/nolusemagawobom.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/cuales_son_las_cartas_generales_de_la_biblia.pdfIn PDF document text
    • https://18cb0a1d-3822-48a5-9ca0-56465202bc9b.filesusr.com/ugd/96564c_ef3e888e6a6f44bcb5f535ddea053011.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/dell_optiplex_gx620_power_cord.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/fmcg_distributor_agreement_format_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a766386-c963-4610-9d77-f05ca880d936/zafolubewexud.pdfIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_ae95a6431a7e4804a162a6b414bd53c5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6728ce23-c80e-41db-b6fe-30eb1819bc59/gibogejezekubu.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/lowrance_elite_5x_chirp_gps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3342bb54-2994-423a-90d8-7c228b0f2707/universidad_del_tolima_sede_bogota_posgrados.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5204 bytes
SHA-256: 58b2342e999a68ff4fb91abbd22ad48667378fc60c548931cccc51e2cc851a35
font_01_sfnt_off000103d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D9 10472 bytes
SHA-256: f937698728533ab8ebaca5af69fd809888dcd0a8a6ab642f85795756a83863f6

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