Malicious PDF — malware analysis report

Static analysis result for SHA-256 e752761c823f6d33…

MALICIOUS

PDF

95.6 KB Created: 2021-06-10 20:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1414293e43e6f2f9b85e24dbfda9a830 SHA-1: 221fbab7a33b1881721e2146ea3d612534802d7d SHA-256: e752761c823f6d33c9a3e6fd45293c4e1b9580add3f0b337e31bc522f9cd509f
186 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 0.9996

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://pistant.ru/pbw?utm_term=super+mario+64+mods+rom PDF link annotation
    • https://telutowi.weebly.com/uploads/1/3/4/9/134904764/b9c0cd38cada.pdfIn PDF document text
    • https://lupupoxapupep.weebly.com/uploads/1/3/4/4/134493602/8595790.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/tugowotamibavix.pdfIn PDF document text
    • https://xunuvetokogira.weebly.com/uploads/1/3/1/3/131384336/4802064.pdfIn PDF document text
    • https://beredixe.weebly.com/uploads/1/3/4/7/134762790/833552.pdfIn PDF document text
    • https://raxuvupu.weebly.com/uploads/1/3/4/7/134707125/316696.pdfIn PDF document text
    • https://madaremowigefin.weebly.com/uploads/1/3/2/6/132681361/xakewakimukusivevo.pdfIn PDF document text
    • https://mivifasev.weebly.com/uploads/1/3/1/4/131483453/ligen.pdfIn PDF document text
    • https://bifitulodagox.weebly.com/uploads/1/3/6/0/136081839/paxofedemoj.pdfIn PDF document text
    • https://nutakiderovex.weebly.com/uploads/1/3/4/6/134622867/6584135.pdfIn PDF document text
    • https://zutizogemene.weebly.com/uploads/1/3/5/3/135348028/c78d9dd88.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
    • https://uploads.strikinglycdn.com/files/5eecf27f-1b14-489a-ad7f-efce29120721/kasesapuvidi.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144441408/88808405672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c69e46-d230-4c69-a25f-87e76db319b5/valisos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c8537c9-6d42-4487-b3d9-a2125216b6c1/el_arte_de_la_seduccin_pelcula_2006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/badbb164-b736-4ea6-ab21-0e3d22518095/lebijasevirefegafudire.pdfIn PDF document text
    • http://bojifimaral.pbworks.com/w/file/fetch/145006278/download_apk_unblock_vpn_browser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d22318-67c9-4ae1-8eba-b5dae2f7a9db/how_do_you_write_a_self_evaluation_essay.pdfIn PDF document text
    • http://rimogeto.pbworks.com/w/file/fetch/144653529/rotigelifabozeroka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc19dad2-3b9a-4052-bc8b-5afca2b5ef23/animal_adoption_centers_near_me_cats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/194fb884-dcdf-4f60-a660-88971f183f57/titanic_movie_free_download_in_tamil_hd_1080p.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 5112 bytes
SHA-256: 06019283887d98c147084ca4208c9a881f401bf898bc1e6d15683820bec7ded8
font_01_sfnt_off00013d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3C 11188 bytes
SHA-256: c149a140416f5402fa55b5e06987fbdb895a5c23555a59fd30ce2e411688dec7
font_02_sfnt_off00016339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16339 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378