Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e9e2219f2be2306…

MALICIOUS

PDF

73.2 KB Created: 2021-02-21 23:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 74f822a10fff4341120d38cbe0669a0f SHA-1: f5a80ceea1280b29dc91cabd3942db0ca9acb01f SHA-256: 5e9e2219f2be2306867fa0bf8d4bc3e3c1b6abf200a4e677db6eb7b71218ef8c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with many pointing to disposable domains and exhibiting link farm characteristics, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document, likely a spearphishing attachment designed to redirect users to malicious sites.

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 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://seumenha.ru/wix?keyword=empirical+formula+of+silver+oxide+lab PDF link annotation
    • https://cdn.sqhk.co/kagaxavog/sgeghjj/70195634551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_600a702a24979.pdfIn PDF document text
    • http://kirunag.66ghz.com/10418929788.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413000/normal_600845931803b.pdfIn PDF document text
    • https://cdn.sqhk.co/janonaset/ZjiVWsh/fowevuguretuwus.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/4nPcaic/17048819422.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/f5ggMjg/vst_drum_instruments_free.pdfIn PDF document text
    • http://rulakegigarapo.22web.org/marijonidefut.pdfIn PDF document text
    • https://cdn.sqhk.co/baxemazisod/iKjjKij/dr_driving_android_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/h1ihbji/nijikonisesubujaxavi.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/0hthaJs/fontspace_tattoo_fonts.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/XiceTij/lezame.pdfIn PDF document text
    • https://cdn.sqhk.co/numanazolov/ehijaBe/sunbeam_ice_cream_frozen_yogurt_maker_manual.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
    • http://lajonapeloros.rf.gd/wonix.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/altair_hyperworks_13_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/mogoruxopu.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/xuvekovajaw.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/material_design_guidelines_by_google.pdfIn PDF document text
    • http://fukasutatota.rf.gd/tusupilukaratobavazawop.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_off0000d3b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B9 5220 bytes
SHA-256: 2808c27d50c617c6cb31f5ac270396b5a420e149267d7921a5c7ced4974ae981
font_01_sfnt_off0000e571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE571 10468 bytes
SHA-256: 0144881571d8547de484fae1d5277e2ce12afab64b2cc82730652c6f56c44a03
font_02_sfnt_off0001094d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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