Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ef9d651c1e0ba3f…

MALICIOUS

PDF

82.4 KB Created: 2021-05-13 08:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1be6c278924d33fe104cadeb98ca53b6 SHA-1: 12944819902ba317e94595ffc858a01fb1f13eb6 SHA-256: 1ef9d651c1e0ba3fd0e5cadf4aad6f1a9fc6a8e3b5a843bb1173bea40e9d4f19
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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=essay+on+importance+of+moral+education+in+250+words PDF link annotation
    • http://ejinaya.com/64935166175vwekn.pdfIn PDF document text
    • https://bopugokux.weebly.com/uploads/1/3/4/9/134901566/nugokozagaxivewo.pdfIn PDF document text
    • https://rezusoroporinon.weebly.com/uploads/1/3/2/6/132695427/waxejopuvijojik_fipizu_pozuke_gidase.pdfIn PDF document text
    • https://kafasomawupi.weebly.com/uploads/1/3/0/7/130775431/fudunamu.pdfIn PDF document text
    • https://rudiduwusoxu.weebly.com/uploads/1/3/4/4/134445317/1c449cb3c712b9.pdfIn PDF document text
    • http://temppicture.xyz/collar_x_malice_unlimited_adonis_guidegloc4.pdfIn PDF document text
    • https://bunivuwavimi.weebly.com/uploads/1/3/4/7/134706582/782f2196f24921.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/2ca3cfde.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/gfHiiMj/49562827912.pdfIn PDF document text
    • https://cdn.sqhk.co/badilapo/jbjeGSw/xunomakeje.pdfIn PDF document text
    • https://fijoxivivuf.weebly.com/uploads/1/3/4/0/134041864/moboguwolafa.pdfIn PDF document text
    • https://zejifibesus.weebly.com/uploads/1/3/4/5/134586543/6b8c3d4e76d3963.pdfIn PDF document text
    • https://gujibimusexuwub.weebly.com/uploads/1/3/4/0/134042380/216278.pdfIn PDF document text
    • http://bridgecommerce.com/92954407335tdbuu.pdfIn PDF document text
    • https://nibebelijatod.weebly.com/uploads/1/3/1/4/131452937/kakapef.pdfIn PDF document text
    • https://defupodanujazi.weebly.com/uploads/1/3/5/3/135346118/bezoxurojojemi_keguxalub_bitunuwitegonez.pdfIn PDF document text
    • https://cdn.sqhk.co/nepofigiper/hd7YMfX/new_funny_video_2020_tik_tok.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/aBibEgf/42350931803.pdfIn PDF document text
    • http://complerbnp.com/corporate_design_mockup_templatemmnvw.pdfIn PDF document text
    • https://ramemegu.weebly.com/uploads/1/3/1/3/131383760/13cd82c7817ee.pdfIn PDF document text
    • https://vobajorod.weebly.com/uploads/1/3/1/4/131438629/2661112.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/huRuijJ/edpuzzle_student_login_code.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_1fe31bf2ccce4f12b192e34b5f258f69.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_f1413ef109e0421ba3658f847c1bf171.pdf?index=trueIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_29d4846929c84fde884a9abecb10890c.pdf?index=trueIn 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_off00010220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10220 5852 bytes
SHA-256: 58d6b4c84957c8a05ce1c6f8ffd4afaf60797c1c2eaec84221abc8db08d53841
font_01_sfnt_off00011614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11614 10496 bytes
SHA-256: c37cae74c423bed003ce86c29cda02198c9f6f2aa623c7327349f62dc3ad0ed3

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