Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b256d2e8489a794…

MALICIOUS

PDF

83.1 KB Created: 2021-05-29 23:47:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a90385f46040e1e758866e46ad57cb4 SHA-1: dfd8a20c6c1f20b76d388b4b29ba57c06f911b98 SHA-256: 3b256d2e8489a794ae6c057011417e1d60801b93a73a20c40c978133058ae3ff
156 Risk Score

Malware Insights

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

This PDF document, disguised as a soil analysis report, contains a large number of external links, many pointing to PDF files hosted on file-sharing services. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, possibly phishing or malware distribution via the linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/123?utm_term=informe+de+calicatas+de+suelos
    • https://ratopavitakam.weebly.com/uploads/1/3/4/4/134460251/zulokezidiwusox_lamiku_susof.pdf
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/8adb3241b87c.pdf
    • https://cdn-cms.f-static.net/uploads/4421943/normal_60326b4ed361d.pdf
    • https://jinunogafexaxim.weebly.com/uploads/1/3/4/8/134884933/lilotavinitamob-suwutonujolip.pdf
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fe0705cd3737.pdf
    • https://cdn-cms.f-static.net/uploads/4485579/normal_60165a13184d1.pdf
    • https://bakigimos.weebly.com/uploads/1/3/4/3/134322269/vafajug-disufexorivuxub-wakulebu.pdf
    • https://sadaxolofomet.weebly.com/uploads/1/3/1/4/131453623/rukapekixozigagalidu.pdf
    • https://dosoxeluniwipeg.weebly.com/uploads/1/3/3/9/133997743/9d33fc78a43a.pdf
    • https://diboboxu.weebly.com/uploads/1/3/4/3/134330346/3527214.pdf
    • https://nilanifaken.weebly.com/uploads/1/3/4/7/134702232/pikugos.pdf
    • https://lodunuvivilaz.weebly.com/uploads/1/3/0/7/130775731/7928931.pdf
    • https://dojovirofolabi.weebly.com/uploads/1/3/1/0/131069789/suteb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/03e2cfc6-12f1-4316-a653-aaee854f1703/strongest_knot_for_braided_fishing_line.pdf
    • https://uploads.strikinglycdn.com/files/6d15ea95-e6f7-419c-a06c-d5759686c68c/79164479026.pdf
    • https://uploads.strikinglycdn.com/files/56e1a38d-bbec-47e2-aaae-bd344c349ad9/sitinubol.pdf
    • https://uploads.strikinglycdn.com/files/2c403b19-1a3d-4b4d-a733-89650cf69f3b/how_old_is_flat_stanley_in_the_book.pdf
    • https://uploads.strikinglycdn.com/files/c3c2b549-ada9-4584-8689-093673452394/liruxop.pdf
    • https://uploads.strikinglycdn.com/files/a40cabed-c528-4c94-9992-e5f5669c70b9/why_is_my_nighthawk_router_not_working.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001065d.bin
454959a538c98561a6553b3bd7d74a521f7f56a9477a146b371a3d6be46feb2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1065D 5104 bytes
font_01_sfnt_off000117a1.bin
fbce44741f7c61cc7eecb162e1c6e177b1e2271c1adf4ebf44cd25155663f208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117A1 11752 bytes

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