Malicious PDF — malware analysis report

Static analysis result for SHA-256 544d015988022348…

MALICIOUS

PDF

74.9 KB Created: 2021-06-09 20:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3aaa4576d48c84de56bb0b30b990f0c SHA-1: e33828a873632cdfbd598b3564df005cc17fcd89 SHA-256: 544d015988022348a2e92f5217d0d9e833f62bdffdc9bc7df99cd6958fde6736
186 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 0.9997

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://crysiq.ru/pbw?utm_term=julio+cortazar+short+stories PDF link annotation
    • https://fezekisovo.weebly.com/uploads/1/3/4/6/134661064/5104c9b4e08c8.pdfIn PDF document text
    • https://ribebolavat.weebly.com/uploads/1/3/1/3/131398139/04863bc23b0.pdfIn PDF document text
    • https://puvugopusu.weebly.com/uploads/1/3/2/7/132711965/lokonokojufemidugisi.pdfIn PDF document text
    • https://tesitibu.weebly.com/uploads/1/3/4/7/134712385/4728215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485580/normal_5fdf49ac1fefa.pdfIn PDF document text
    • https://befofevaz.weebly.com/uploads/1/3/0/9/130969220/91991eea84.pdfIn PDF document text
    • https://xizovetezewo.weebly.com/uploads/1/3/2/8/132814166/9650640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445742/normal_603c15a93f067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471092/normal_602855a720a05.pdfIn PDF document text
    • https://jalamipitifem.weebly.com/uploads/1/3/0/7/130738892/3586233.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joxakuruvi.pbworks.com/f/how_long_is_proheart_good_for.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59b230f6-7c83-485b-82fc-5def60329a79/euripides_medea_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee146430-4670-4c52-b26d-661bfe170126/air_force_ones_high_top_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fab969f4-bead-4916-90e8-df83ce974145/arris_surfboard_sbg6580_dual_band_setup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bc96a14-4e84-44d6-b218-976b8dd85cc5/36981128136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b450e165-6450-4089-9f8e-9ee731778bb1/87751972391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47c9360-2517-49e4-b6bd-60cae4b4277e/kutazixusuzof.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144444567/pubimefuxofejefazi.pdfIn PDF document text
    • http://kolasotosexu.pbworks.com/f/jixodamujuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88fedbc4-f640-45fb-b5cd-25b079ffc8f4/vegopewebamu.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_off0000e9c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 4924 bytes
SHA-256: 157b31f33de226340f4b961b73b2459366bf55ce5f961179cb15fcf56141ac6c
font_01_sfnt_off0000fa7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA7D 10396 bytes
SHA-256: 9869f3a09af0f751cbe9d072f6675e3e1f4e1656b483395a0c02a595b1eeeeae

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